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breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Lee%2C+H+Y&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Lee%2C+H+Y&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Lee%2C+H+Y&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.13665">arXiv:2501.13665</a> <span> [<a href="https://arxiv.org/pdf/2501.13665">pdf</a>, <a href="https://arxiv.org/format/2501.13665">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Limits on WIMP dark matter with NaI(Tl) crystals in three years of COSINE-100 data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Yu%2C+G+H">G. H. Yu</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Cho%2C+J+Y">J. Y. Cho</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Franca%2C+L+E">L. E. Franca</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+B+H">B. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a> , et al. (34 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2501.13665v1-abstract-short" style="display: inline;"> We report limits on WIMP dark matter derived from three years of data collected by the COSINE-100 experiment with NaI(Tl) crystals, achieving an improved energy threshold of 0.7 keV. This lowered threshold enhances sensitivity in the sub-GeV mass range, extending the reach for direct detection of low-mass dark matter. Although no excess of WIMP-like events was observed, the increased sensitivity e… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.13665v1-abstract-full').style.display = 'inline'; document.getElementById('2501.13665v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.13665v1-abstract-full" style="display: none;"> We report limits on WIMP dark matter derived from three years of data collected by the COSINE-100 experiment with NaI(Tl) crystals, achieving an improved energy threshold of 0.7 keV. This lowered threshold enhances sensitivity in the sub-GeV mass range, extending the reach for direct detection of low-mass dark matter. Although no excess of WIMP-like events was observed, the increased sensitivity enabled a model-independent comparison between the expected WIMP signal rate-based on mass limits from our data-and DAMA's reported modulation amplitude. Our findings strongly disfavor the DAMA signal as originating from WIMP interactions, fully excluding DAMA/LIBRA 3$蟽$ allowed regions and providing enhanced WIMP mass limits by an order of magnitude in the spin-independent model compared to previous results. In the spin-dependent model, cross-section upper limits were obtained in the mass range [0.1-5.0] GeV/c$^2$, with additional sensitivity to sub-GeV WIMPs through the inclusion of the Migdal effect. These results represent substantial progress in low-mass dark matter exploration and reinforce constraints on the longstanding DAMA claim. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.13665v1-abstract-full').style.display = 'none'; document.getElementById('2501.13665v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.13226">arXiv:2409.13226</a> <span> [<a href="https://arxiv.org/pdf/2409.13226">pdf</a>, <a href="https://arxiv.org/format/2409.13226">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> COSINE-100 Full Dataset Challenges the Annual Modulation Signal of DAMA/LIBRA </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Cho%2C+J+Y">J. Y. Cho</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Franca%2C+L+E">L. E. Franca</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+B+H">B. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+E+K">E. K. Lee</a> , et al. (34 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2409.13226v1-abstract-short" style="display: inline;"> For over 25 years, the DAMA/LIBRA collaboration has claimed to observe an annual modulation signal, suggesting the existence of dark matter interactions. However, no other experiments have replicated their result using different detector materials. To address this puzzle, the COSINE-100 collaboration conducted a model-independent test using 106 kg of sodium iodide as detectors, the same target mat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.13226v1-abstract-full').style.display = 'inline'; document.getElementById('2409.13226v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.13226v1-abstract-full" style="display: none;"> For over 25 years, the DAMA/LIBRA collaboration has claimed to observe an annual modulation signal, suggesting the existence of dark matter interactions. However, no other experiments have replicated their result using different detector materials. To address this puzzle, the COSINE-100 collaboration conducted a model-independent test using 106 kg of sodium iodide as detectors, the same target material as DAMA/LIBRA. Analyzing data collected over 6.4 years, with improved energy calibration and time-dependent background description, we found no evidence of an annual modulation signal, challenging the DAMA/LIBRA result with a confidence level greater than 3$蟽$. This finding represents a significant step toward resolving the long-standing debate surrounding DAMA/LIBRA's dark matter claim, indicating that the observed modulation is unlikely to be caused by dark matter interactions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.13226v1-abstract-full').style.display = 'none'; document.getElementById('2409.13226v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.04763">arXiv:2409.04763</a> <span> [<a href="https://arxiv.org/pdf/2409.04763">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Chalcogenide Metasurfaces Enabling Ultra-Wideband Detectors from Visible to Mid-infrared </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Zhang%2C+S">Shutao Zhang</a>, <a href="/search/?searchtype=author&query=An%2C+S">Shu An</a>, <a href="/search/?searchtype=author&query=Dai%2C+M">Mingjin Dai</a>, <a href="/search/?searchtype=author&query=Wu%2C+Q+Y+S">Qing Yang Steve Wu</a>, <a href="/search/?searchtype=author&query=Adanan%2C+N+Q">Nur Qalishah Adanan</a>, <a href="/search/?searchtype=author&query=Zhang%2C+J">Jun Zhang</a>, <a href="/search/?searchtype=author&query=Liu%2C+Y">Yan Liu</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y+L">Henry Yit Loong Lee</a>, <a href="/search/?searchtype=author&query=Wong%2C+N+L+M">Nancy Lai Mun Wong</a>, <a href="/search/?searchtype=author&query=Suwardi%2C+A">Ady Suwardi</a>, <a href="/search/?searchtype=author&query=Ding%2C+J">Jun Ding</a>, <a href="/search/?searchtype=author&query=Simpson%2C+R+E">Robert Edward Simpson</a>, <a href="/search/?searchtype=author&query=Wang%2C+Q+J">Qi Jie Wang</a>, <a href="/search/?searchtype=author&query=Yang%2C+J+K+W">Joel K. W. Yang</a>, <a href="/search/?searchtype=author&query=Dong%2C+Z">Zhaogang Dong</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2409.04763v1-abstract-short" style="display: inline;"> Thermoelectric materials can be designed to support optical resonances across multiple spectral ranges to enable ultra-wide band photodetection. For instance, antimony telluride (Sb2Te3) chalcogenide exhibits interband plasmonic resonances in the visible range and Mie resonances in the mid-infrared (mid-IR) range, while simultaneously possessing large thermoelectric Seebeck coefficients. In this p… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.04763v1-abstract-full').style.display = 'inline'; document.getElementById('2409.04763v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.04763v1-abstract-full" style="display: none;"> Thermoelectric materials can be designed to support optical resonances across multiple spectral ranges to enable ultra-wide band photodetection. For instance, antimony telluride (Sb2Te3) chalcogenide exhibits interband plasmonic resonances in the visible range and Mie resonances in the mid-infrared (mid-IR) range, while simultaneously possessing large thermoelectric Seebeck coefficients. In this paper, we designed and fabricated Sb2Te3 metasurface devices to achieve resonant absorption for enabling photodetectors operating across an ultra-wideband spectrum, from visible to mid-IR. Furthermore, relying on asymmetric Sb2Te3 metasurface, we demonstrated the thermoelectric photodetectors with polarization-selectivity. This work provides a potential platform towards the portable ultrawide band spectrometers at room temperature, for environmental sensing applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.04763v1-abstract-full').style.display = 'none'; document.getElementById('2409.04763v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2408.14688">arXiv:2408.14688</a> <span> [<a href="https://arxiv.org/pdf/2408.14688">pdf</a>, <a href="https://arxiv.org/format/2408.14688">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/19/12/P12013">10.1088/1748-0221/19/12/P12013 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Lowering threshold of NaI(Tl) scintillator to 0.7 keV in the COSINE-100 experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Yu%2C+G+H">G. H. Yu</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Cho%2C+J+Y">J. Y. Cho</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Fran%C3%A7a%2C+L+E">L. E. Fran莽a</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+B+H">B. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a> , et al. (34 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2408.14688v2-abstract-short" style="display: inline;"> COSINE-100 is a direct dark matter search experiment, with the primary goal of testing the annual modulation signal observed by DAMA/LIBRA, using the same target material, NaI(Tl). In previous analyses, we achieved the same 1 keV energy threshold used in the DAMA/LIBRA's analysis that reported an annual modulation signal with 11.6$蟽$ significance. In this article, we report an improved analysis th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.14688v2-abstract-full').style.display = 'inline'; document.getElementById('2408.14688v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2408.14688v2-abstract-full" style="display: none;"> COSINE-100 is a direct dark matter search experiment, with the primary goal of testing the annual modulation signal observed by DAMA/LIBRA, using the same target material, NaI(Tl). In previous analyses, we achieved the same 1 keV energy threshold used in the DAMA/LIBRA's analysis that reported an annual modulation signal with 11.6$蟽$ significance. In this article, we report an improved analysis that lowered the threshold to 0.7 keV, thanks to the application of Multi-Layer Perception network and a new likelihood parameter with waveforms in the frequency domain. The lower threshold would enable a better comparison of COSINE-100 with new DAMA results with a 0.75 keV threshold and account for differences in quenching factors. Furthermore the lower threshold can enhance COSINE-100's sensitivity to sub-GeV dark matter searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.14688v2-abstract-full').style.display = 'none'; document.getElementById('2408.14688v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 19 P12013 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2408.09806">arXiv:2408.09806</a> <span> [<a href="https://arxiv.org/pdf/2408.09806">pdf</a>, <a href="https://arxiv.org/format/2408.09806">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Improved background modeling for dark matter search with COSINE-100 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Yu%2C+G+H">G. H. Yu</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Cho%2C+J+Y">J. Y. Cho</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Franca%2C+L+E">L. E. Franca</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+B+H">B. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a> , et al. (33 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2408.09806v1-abstract-short" style="display: inline;"> COSINE-100 aims to conclusively test the claimed dark matter annual modulation signal detected by DAMA/LIBRA collaboration. DAMA/LIBRA has released updated analysis results by lowering the energy threshold to 0.75 keV through various upgrades. They have consistently claimed to have observed the annual modulation. In COSINE-100, it is crucial to lower the energy threshold for a direct comparison wi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.09806v1-abstract-full').style.display = 'inline'; document.getElementById('2408.09806v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2408.09806v1-abstract-full" style="display: none;"> COSINE-100 aims to conclusively test the claimed dark matter annual modulation signal detected by DAMA/LIBRA collaboration. DAMA/LIBRA has released updated analysis results by lowering the energy threshold to 0.75 keV through various upgrades. They have consistently claimed to have observed the annual modulation. In COSINE-100, it is crucial to lower the energy threshold for a direct comparison with DAMA/LIBRA, which also enhances the sensitivity of the search for low-mass dark matter, enabling COSINE-100 to explore this area. Therefore, it is essential to have a precise and quantitative understanding of the background spectrum across all energy ranges. This study expands the background modeling from 0.7 to 4000 keV using 2.82 years of COSINE-100 data. The modeling has been improved to describe the background spectrum across all energy ranges accurately. Assessments of the background spectrum are presented, considering the nonproportionality of NaI(Tl) crystals at both low and high energies and the characteristic X-rays produced by the interaction of external backgrounds with materials such as copper. Additionally, constraints on the fit parameters obtained from the alpha spectrum modeling fit are integrated into this model. These improvements are detailed in the paper. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.09806v1-abstract-full').style.display = 'none'; document.getElementById('2408.09806v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.20021">arXiv:2407.20021</a> <span> [<a href="https://arxiv.org/pdf/2407.20021">pdf</a>, <a href="https://arxiv.org/format/2407.20021">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Artificial Intelligence">cs.AI</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computer Vision and Pattern Recognition">cs.CV</span> </div> </div> <p class="title is-5 mathjax"> MimiQ: Low-Bit Data-Free Quantization of Vision Transformers with Encouraging Inter-Head Attention Similarity </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Choi%2C+K">Kanghyun Choi</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hye Yoon Lee</a>, <a href="/search/?searchtype=author&query=Kwon%2C+D">Dain Kwon</a>, <a href="/search/?searchtype=author&query=Park%2C+S">SunJong Park</a>, <a href="/search/?searchtype=author&query=Kim%2C+K">Kyuyeun Kim</a>, <a href="/search/?searchtype=author&query=Park%2C+N">Noseong Park</a>, <a href="/search/?searchtype=author&query=Lee%2C+J">Jinho Lee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2407.20021v3-abstract-short" style="display: inline;"> Data-free quantization (DFQ) is a technique that creates a lightweight network from its full-precision counterpart without the original training data, often through a synthetic dataset. Although several DFQ methods have been proposed for vision transformer (ViT) architectures, they fail to achieve efficacy in low-bit settings. Examining the existing methods, we identify that their synthetic data p… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.20021v3-abstract-full').style.display = 'inline'; document.getElementById('2407.20021v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.20021v3-abstract-full" style="display: none;"> Data-free quantization (DFQ) is a technique that creates a lightweight network from its full-precision counterpart without the original training data, often through a synthetic dataset. Although several DFQ methods have been proposed for vision transformer (ViT) architectures, they fail to achieve efficacy in low-bit settings. Examining the existing methods, we identify that their synthetic data produce misaligned attention maps, while those of the real samples are highly aligned. From the observation of aligned attention, we find that aligning attention maps of synthetic data helps to improve the overall performance of quantized ViTs. Motivated by this finding, we devise MimiQ, a novel DFQ method designed for ViTs that focuses on inter-head attention similarity. First, we generate synthetic data by aligning head-wise attention responses in relation to spatial query patches. Then, we apply head-wise structural attention distillation to align the attention maps of the quantized network to those of the full-precision teacher. The experimental results show that the proposed method significantly outperforms baselines, setting a new state-of-the-art performance for data-free ViT quantization. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.20021v3-abstract-full').style.display = 'none'; document.getElementById('2407.20021v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Author Preprint</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.16003">arXiv:2406.16003</a> <span> [<a href="https://arxiv.org/pdf/2406.16003">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Unidirectional Chiral Emission via Twisted Bi-layer Metasurfaces </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Gromyko%2C+D">Dmitrii Gromyko</a>, <a href="/search/?searchtype=author&query=An%2C+S">Shu An</a>, <a href="/search/?searchtype=author&query=Gorelik%2C+S">Sergey Gorelik</a>, <a href="/search/?searchtype=author&query=Xu%2C+J">Jiahui Xu</a>, <a href="/search/?searchtype=author&query=Lim%2C+L+J">Li Jun Lim</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y+L">Henry Yit Loong Lee</a>, <a href="/search/?searchtype=author&query=Tjiptoharsono%2C+F">Febiana Tjiptoharsono</a>, <a href="/search/?searchtype=author&query=Tan%2C+Z">Zhi-Kuang Tan</a>, <a href="/search/?searchtype=author&query=Qiu%2C+C">Cheng-Wei Qiu</a>, <a href="/search/?searchtype=author&query=Dong%2C+Z">Zhaogang Dong</a>, <a href="/search/?searchtype=author&query=Wu%2C+L">Lin Wu</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2406.16003v1-abstract-short" style="display: inline;"> Controlling and channelling light emissions from unpolarized quantum dots into specific directions with chiral polarization remains a key challenge in modern photonics. Stacked metasurface designs offer a potential compact solution for chirality and directionality engineering. However, experimental observations of directional chiral radiation from resonant metasurfaces with quantum emitters remain… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.16003v1-abstract-full').style.display = 'inline'; document.getElementById('2406.16003v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.16003v1-abstract-full" style="display: none;"> Controlling and channelling light emissions from unpolarized quantum dots into specific directions with chiral polarization remains a key challenge in modern photonics. Stacked metasurface designs offer a potential compact solution for chirality and directionality engineering. However, experimental observations of directional chiral radiation from resonant metasurfaces with quantum emitters remain obscure. In this paper, we present experimental observations of unidirectional chiral emission from a twisted bi-layer metasurface via multi-dimensional control, including twist angle, interlayer distance, and lateral displacement between the top and bottom layers, as enabled by doublet alignment lithography (DAL). First, maintaining alignment, the metasurface demonstrates a resonant intrinsic optical chirality with near-unity circular dichroism of 0.94 and reflectance difference of 74%, where a high circular dichroism greater than 0.9 persists across a wide range of angles from -11 to 11 degrees. Second, engineered lateral displacement induces a unidirectional chiral resonance, resulting in unidirectional chiral emission from the quantum dots deposited onto the metasurface. Our bi-layer metasurfaces offer a universal compact platform for efficient radiation manipulation over a wide angular range, promising potential applications in miniaturized lasers, grating couplers, and chiral nanoantennas. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.16003v1-abstract-full').style.display = 'none'; document.getElementById('2406.16003v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.01954">arXiv:2404.01954</a> <span> [<a href="https://arxiv.org/pdf/2404.01954">pdf</a>, <a href="https://arxiv.org/format/2404.01954">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computation and Language">cs.CL</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Artificial Intelligence">cs.AI</span> </div> </div> <p class="title is-5 mathjax"> HyperCLOVA X Technical Report </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Yoo%2C+K+M">Kang Min Yoo</a>, <a href="/search/?searchtype=author&query=Han%2C+J">Jaegeun Han</a>, <a href="/search/?searchtype=author&query=In%2C+S">Sookyo In</a>, <a href="/search/?searchtype=author&query=Jeon%2C+H">Heewon Jeon</a>, <a href="/search/?searchtype=author&query=Jeong%2C+J">Jisu Jeong</a>, <a href="/search/?searchtype=author&query=Kang%2C+J">Jaewook Kang</a>, <a href="/search/?searchtype=author&query=Kim%2C+H">Hyunwook Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K">Kyung-Min Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+M">Munhyong Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S">Sungju Kim</a>, <a href="/search/?searchtype=author&query=Kwak%2C+D">Donghyun Kwak</a>, <a href="/search/?searchtype=author&query=Kwak%2C+H">Hanock Kwak</a>, <a href="/search/?searchtype=author&query=Kwon%2C+S+J">Se Jung Kwon</a>, <a href="/search/?searchtype=author&query=Lee%2C+B">Bado Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+D">Dongsoo Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+G">Gichang Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+J">Jooho Lee</a>, <a href="/search/?searchtype=author&query=Park%2C+B">Baeseong Park</a>, <a href="/search/?searchtype=author&query=Shin%2C+S">Seongjin Shin</a>, <a href="/search/?searchtype=author&query=Yu%2C+J">Joonsang Yu</a>, <a href="/search/?searchtype=author&query=Baek%2C+S">Seolki Baek</a>, <a href="/search/?searchtype=author&query=Byeon%2C+S">Sumin Byeon</a>, <a href="/search/?searchtype=author&query=Cho%2C+E">Eungsup Cho</a>, <a href="/search/?searchtype=author&query=Choe%2C+D">Dooseok Choe</a>, <a href="/search/?searchtype=author&query=Han%2C+J">Jeesung Han</a> , et al. (371 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.01954v2-abstract-short" style="display: inline;"> We introduce HyperCLOVA X, a family of large language models (LLMs) tailored to the Korean language and culture, along with competitive capabilities in English, math, and coding. HyperCLOVA X was trained on a balanced mix of Korean, English, and code data, followed by instruction-tuning with high-quality human-annotated datasets while abiding by strict safety guidelines reflecting our commitment t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.01954v2-abstract-full').style.display = 'inline'; document.getElementById('2404.01954v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.01954v2-abstract-full" style="display: none;"> We introduce HyperCLOVA X, a family of large language models (LLMs) tailored to the Korean language and culture, along with competitive capabilities in English, math, and coding. HyperCLOVA X was trained on a balanced mix of Korean, English, and code data, followed by instruction-tuning with high-quality human-annotated datasets while abiding by strict safety guidelines reflecting our commitment to responsible AI. The model is evaluated across various benchmarks, including comprehensive reasoning, knowledge, commonsense, factuality, coding, math, chatting, instruction-following, and harmlessness, in both Korean and English. HyperCLOVA X exhibits strong reasoning capabilities in Korean backed by a deep understanding of the language and cultural nuances. Further analysis of the inherent bilingual nature and its extension to multilingualism highlights the model's cross-lingual proficiency and strong generalization ability to untargeted languages, including machine translation between several language pairs and cross-lingual inference tasks. We believe that HyperCLOVA X can provide helpful guidance for regions or countries in developing their sovereign LLMs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.01954v2-abstract-full').style.display = 'none'; document.getElementById('2404.01954v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">44 pages; updated authors list and fixed author names</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.14838">arXiv:2401.14838</a> <span> [<a href="https://arxiv.org/pdf/2401.14838">pdf</a>, <a href="https://arxiv.org/format/2401.14838">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computer Vision and Pattern Recognition">cs.CV</span> </div> </div> <p class="title is-5 mathjax"> Multi-modality action recognition based on dual feature shift in vehicle cabin monitoring </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Lin%2C+D">Dan Lin</a>, <a href="/search/?searchtype=author&query=Lee%2C+P+H+Y">Philip Hann Yung Lee</a>, <a href="/search/?searchtype=author&query=Li%2C+Y">Yiming Li</a>, <a href="/search/?searchtype=author&query=Wang%2C+R">Ruoyu Wang</a>, <a href="/search/?searchtype=author&query=Yap%2C+K">Kim-Hui Yap</a>, <a href="/search/?searchtype=author&query=Li%2C+B">Bingbing Li</a>, <a href="/search/?searchtype=author&query=Ngim%2C+Y+S">You Shing Ngim</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2401.14838v1-abstract-short" style="display: inline;"> Driver Action Recognition (DAR) is crucial in vehicle cabin monitoring systems. In real-world applications, it is common for vehicle cabins to be equipped with cameras featuring different modalities. However, multi-modality fusion strategies for the DAR task within car cabins have rarely been studied. In this paper, we propose a novel yet efficient multi-modality driver action recognition method b… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.14838v1-abstract-full').style.display = 'inline'; document.getElementById('2401.14838v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.14838v1-abstract-full" style="display: none;"> Driver Action Recognition (DAR) is crucial in vehicle cabin monitoring systems. In real-world applications, it is common for vehicle cabins to be equipped with cameras featuring different modalities. However, multi-modality fusion strategies for the DAR task within car cabins have rarely been studied. In this paper, we propose a novel yet efficient multi-modality driver action recognition method based on dual feature shift, named DFS. DFS first integrates complementary features across modalities by performing modality feature interaction. Meanwhile, DFS achieves the neighbour feature propagation within single modalities, by feature shifting among temporal frames. To learn common patterns and improve model efficiency, DFS shares feature extracting stages among multiple modalities. Extensive experiments have been carried out to verify the effectiveness of the proposed DFS model on the Drive\&Act dataset. The results demonstrate that DFS achieves good performance and improves the efficiency of multi-modality driver action recognition. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.14838v1-abstract-full').style.display = 'none'; document.getElementById('2401.14838v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.07462">arXiv:2401.07462</a> <span> [<a href="https://arxiv.org/pdf/2401.07462">pdf</a>, <a href="https://arxiv.org/format/2401.07462">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-024-12770-1">10.1140/epjc/s10052-024-12770-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nonproportionality of NaI(Tl) Scintillation Detector for Dark Matter Search Experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Lee%2C+S+M">S. M. Lee</a>, <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Cho%2C+J+Y">J. Y. Cho</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=a%2C+L+E+F">L. E. Fran. a</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+B+H">B. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+W">S. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a> , et al. (37 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2401.07462v2-abstract-short" style="display: inline;"> We present a comprehensive study of the nonproportionality of NaI(Tl) scintillation detectors within the context of dark matter search experiments. Our investigation, which integrates COSINE-100 data with supplementary $纬$ spectroscopy, measures light yields across diverse energy levels from full-energy $纬$ peaks produced by the decays of various isotopes. These $纬$ peaks of interest were produced… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.07462v2-abstract-full').style.display = 'inline'; document.getElementById('2401.07462v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.07462v2-abstract-full" style="display: none;"> We present a comprehensive study of the nonproportionality of NaI(Tl) scintillation detectors within the context of dark matter search experiments. Our investigation, which integrates COSINE-100 data with supplementary $纬$ spectroscopy, measures light yields across diverse energy levels from full-energy $纬$ peaks produced by the decays of various isotopes. These $纬$ peaks of interest were produced by decays supported by both long and short-lived isotopes. Analyzing peaks from decays supported only by short-lived isotopes presented a unique challenge due to their limited statistics and overlapping energies, which was overcome by long-term data collection and a time-dependent analysis. A key achievement is the direct measurement of the 0.87 keV light yield, resulting from the cascade following electron capture decay of $^{22}$Na from internal contamination. This measurement, previously accessible only indirectly, deepens our understanding of NaI(Tl) scintillator behavior in the region of interest for dark matter searches. This study holds substantial implications for background modeling and the interpretation of dark matter signals in NaI(Tl) experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.07462v2-abstract-full').style.display = 'none'; document.getElementById('2401.07462v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 84 (2024) 484 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2312.07957">arXiv:2312.07957</a> <span> [<a href="https://arxiv.org/pdf/2312.07957">pdf</a>, <a href="https://arxiv.org/format/2312.07957">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Scintillation characteristics of an undoped CsI crystal at low-temperature for dark matter search </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Jeon%2C+J+A">J. A. Jeon</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+S">H. S. Lee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2312.07957v2-abstract-short" style="display: inline;"> The scintillation characteristics of 1 g undoped CsI crystal were studied by directly coupling two silicon photomultipliers (SiPMs) over a temperature range from room temperature to 86 K. The scintillation decay time and light output were measured using x-ray and gamma-ray peaks from a $^{109}$Cd radioactive source. An increase in decay time was observed as the temperature decreased from room temp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.07957v2-abstract-full').style.display = 'inline'; document.getElementById('2312.07957v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.07957v2-abstract-full" style="display: none;"> The scintillation characteristics of 1 g undoped CsI crystal were studied by directly coupling two silicon photomultipliers (SiPMs) over a temperature range from room temperature to 86 K. The scintillation decay time and light output were measured using x-ray and gamma-ray peaks from a $^{109}$Cd radioactive source. An increase in decay time was observed as the temperature decreased from room temperature to 86 K, ranging from 76 ns to 605 ns. The light output increased as well, reaching 37.9 $\pm$ 1.5 photoelectrons per keV electron-equivalent at 86 K, which is approximately 18 times higher than the light yield at room temperature. Leveraging the significantly enhanced scintillation light output of the undoped CsI crystal at low temperature, coupling it with SiPMs results into a promising detector for dark matter search. Both cesium and iodine have a proton odd number, thus they are suitable targets to probe dark matter-proton spin dependent interactions. We evaluated the sensitivity of the detector here proposed to light dark matter-proton spin dependent interactions. We included the Migdal effect and assumed 200\,kg of undoped CsI crystals for the dark matter search. We conclude that undoped CsI coupled to SiPM can exhibit world-competitive sensitivities for low-mass dark matter detection, particularly for the dark matter-proton spin-dependent interaction. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.07957v2-abstract-full').style.display = 'none'; document.getElementById('2312.07957v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.05010">arXiv:2311.05010</a> <span> [<a href="https://arxiv.org/pdf/2311.05010">pdf</a>, <a href="https://arxiv.org/format/2311.05010">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.astropartphys.2024.102945">10.1016/j.astropartphys.2024.102945 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Alpha backgrounds in NaI(Tl) crystals of COSINE-100 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Cavalcante%2C+D+F+F+S">D. F. F. S. Cavalcante</a>, <a href="/search/?searchtype=author&query=Cho%2C+J+Y">J. Y. Cho</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Franca%2C+L+E">L. E. Franca</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+B+H">B. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+W">S. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a> , et al. (38 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.05010v3-abstract-short" style="display: inline;"> COSINE-100 is a dark matter direct detection experiment with 106 kg NaI(Tl) as the target material. 210Pb and daughter isotopes are a dominant background in the WIMP region of interest and are detected via beta decay and alpha decay. Analysis of the alpha channel complements the background model as observed in the beta/gamma channel. We present the measurement of the quenching factors and Monte Ca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.05010v3-abstract-full').style.display = 'inline'; document.getElementById('2311.05010v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.05010v3-abstract-full" style="display: none;"> COSINE-100 is a dark matter direct detection experiment with 106 kg NaI(Tl) as the target material. 210Pb and daughter isotopes are a dominant background in the WIMP region of interest and are detected via beta decay and alpha decay. Analysis of the alpha channel complements the background model as observed in the beta/gamma channel. We present the measurement of the quenching factors and Monte Carlo simulation results and activity quantification of the alpha decay components of the COSINE-100 NaI(Tl) crystals. The data strongly indicate that the alpha decays probabilistically undergo two possible quenching factors but require further investigation. The fitted results are consistent with independent measurements and improve the overall understanding of the COSINE-100 backgrounds. Furthermore, the half-life of 216Po has been measured to be 143.4 +/- 1.2 ms, which is consistent with and more precise than recent measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.05010v3-abstract-full').style.display = 'none'; document.getElementById('2311.05010v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2307.09814">arXiv:2307.09814</a> <span> [<a href="https://arxiv.org/pdf/2307.09814">pdf</a>, <a href="https://arxiv.org/format/2307.09814">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.108.092006">10.1103/PhysRevD.108.092006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for inelastic WIMP-iodine scattering with COSINE-100 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Franca%2C+L+E">L. E. Franca</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Jo%2C+J+H">J. H. Jo</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+B+H">B. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a> , et al. (34 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2307.09814v2-abstract-short" style="display: inline;"> We report the results of a search for inelastic scattering of weakly interacting massive particles (WIMPs) off $^{127}$I nuclei using NaI(Tl) crystals with a data exposure of 97.7 kg$\cdot$years from the COSINE-100 experiment. The signature of inelastic WIMP-$^{127}$I scattering is a nuclear recoil accompanied by a 57.6 keV $纬$-ray from the prompt deexcitation, producing a more energetic signal co… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.09814v2-abstract-full').style.display = 'inline'; document.getElementById('2307.09814v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2307.09814v2-abstract-full" style="display: none;"> We report the results of a search for inelastic scattering of weakly interacting massive particles (WIMPs) off $^{127}$I nuclei using NaI(Tl) crystals with a data exposure of 97.7 kg$\cdot$years from the COSINE-100 experiment. The signature of inelastic WIMP-$^{127}$I scattering is a nuclear recoil accompanied by a 57.6 keV $纬$-ray from the prompt deexcitation, producing a more energetic signal compared to the typical WIMP nuclear recoil signal. We found no evidence for this inelastic scattering signature and set a 90 $\%$ confidence level upper limit on the WIMP-proton spin-dependent, inelastic scattering cross section of $1.2 \times 10^{-37} {\rm cm^{2}}$ at the WIMP mass 500 ${\rm GeV/c^{2}}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.09814v2-abstract-full').style.display = 'none'; document.getElementById('2307.09814v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 5 figures. arXiv admin note: text overlap with arXiv:2104.03537</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 108, 092006 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.14229">arXiv:2306.14229</a> <span> [<a href="https://arxiv.org/pdf/2306.14229">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Engineering Perovskite Emissions via Optical Quasi-Bound-States-in-the-Continuum </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Cs%C3%A1nyi%2C+E">Evelin Cs谩nyi</a>, <a href="/search/?searchtype=author&query=Liu%2C+Y">Yan Liu</a>, <a href="/search/?searchtype=author&query=Rezaei%2C+S+D">Soroosh Daqiqeh Rezaei</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y+L">Henry Yit Loong Lee</a>, <a href="/search/?searchtype=author&query=Tjiptoharsono%2C+F">Febiana Tjiptoharsono</a>, <a href="/search/?searchtype=author&query=Mahfoud%2C+Z">Zackaria Mahfoud</a>, <a href="/search/?searchtype=author&query=Gorelik%2C+S">Sergey Gorelik</a>, <a href="/search/?searchtype=author&query=Zhao%2C+X">Xiaofei Zhao</a>, <a href="/search/?searchtype=author&query=Lim%2C+L+J">Li Jun Lim</a>, <a href="/search/?searchtype=author&query=Zhu%2C+D">Di Zhu</a>, <a href="/search/?searchtype=author&query=Wu%2C+J">Jing Wu</a>, <a href="/search/?searchtype=author&query=Goh%2C+K+E+J">Kuan Eng Johnson Goh</a>, <a href="/search/?searchtype=author&query=Gao%2C+W">Weibo Gao</a>, <a href="/search/?searchtype=author&query=Tan%2C+Z">Zhi-Kuang Tan</a>, <a href="/search/?searchtype=author&query=Leggett%2C+G">Graham Leggett</a>, <a href="/search/?searchtype=author&query=Qiu%2C+C">Cheng-Wei Qiu</a>, <a href="/search/?searchtype=author&query=Dong%2C+Z">Zhaogang Dong</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2306.14229v1-abstract-short" style="display: inline;"> Metal halide perovskite quantum dots (PQDs) have emerged as promising materials due to their exceptional photoluminescence (PL) properties. A wide range of applications could benefit from adjustable luminescence properties, while preserving the physical and chemical properties of the PQDs. Therefore, post-synthesis engineering has gained attention recently, involving the use of ion-exchange or ext… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.14229v1-abstract-full').style.display = 'inline'; document.getElementById('2306.14229v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.14229v1-abstract-full" style="display: none;"> Metal halide perovskite quantum dots (PQDs) have emerged as promising materials due to their exceptional photoluminescence (PL) properties. A wide range of applications could benefit from adjustable luminescence properties, while preserving the physical and chemical properties of the PQDs. Therefore, post-synthesis engineering has gained attention recently, involving the use of ion-exchange or external stimuli, such as extreme pressure, magnetic and electric fields. Nevertheless, these methods typically suffer from spectrum broadening, intensity quenching or yield multiple bands. Alternatively, photonic antennas can modify the radiative decay channel of perovskites via the Purcell effect, with the largest wavelength shift being 8 nm to date, at an expense of 5-fold intensity loss. Here, we present an optical nanoantenna array with polarization-controlled quasi-bound-states-in-the-continuum (q-BIC) resonances, which can engineer and shift the photoluminescence wavelength over a ~39 nm range and confers a 21-fold emission enhancement of FAPbI3 perovskite QDs. The spectrum is engineered in a non-invasive manner via lithographically defined antennas and the pump laser polarization at ambient conditions. Our research provides a path towards advanced optoelectronic devices, such as spectrally tailored quantum emitters and lasers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.14229v1-abstract-full').style.display = 'none'; document.getElementById('2306.14229v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">39 pages, 4 figures in the main text and 10 figures in the supporting information</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.00322">arXiv:2306.00322</a> <span> [<a href="https://arxiv.org/pdf/2306.00322">pdf</a>, <a href="https://arxiv.org/format/2306.00322">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.131.201802">10.1103/PhysRevLett.131.201802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for Boosted Dark Matter in COSINE-100 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Franca%2C+L+E">L. E. Franca</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Jo%2C+J+H">J. H. Jo</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+B+H">B. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a> , et al. (34 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2306.00322v2-abstract-short" style="display: inline;"> We search for energetic electron recoil signals induced by boosted dark matter (BDM) from the galactic center using the COSINE-100 array of NaI(Tl) crystal detectors at the Yangyang Underground Laboratory. The signal would be an excess of events with energies above 4 MeV over the well-understood background. Because no excess of events are observed in a 97.7 kg$\cdot$years exposure, we set limits o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.00322v2-abstract-full').style.display = 'inline'; document.getElementById('2306.00322v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.00322v2-abstract-full" style="display: none;"> We search for energetic electron recoil signals induced by boosted dark matter (BDM) from the galactic center using the COSINE-100 array of NaI(Tl) crystal detectors at the Yangyang Underground Laboratory. The signal would be an excess of events with energies above 4 MeV over the well-understood background. Because no excess of events are observed in a 97.7 kg$\cdot$years exposure, we set limits on BDM interactions under a variety of hypotheses. Notably, we explored the dark photon parameter space, leading to competitive limits compared to direct dark photon search experiments, particularly for dark photon masses below 4\,MeV and considering the invisible decay mode. Furthermore, by comparing our results with a previous BDM search conducted by the Super-Kamionkande experiment, we found that the COSINE-100 detector has advantages in searching for low-mass dark matter. This analysis demonstrates the potential of the COSINE-100 detector to search for MeV electron recoil signals produced by the dark sector particle interactions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.00322v2-abstract-full').style.display = 'none'; document.getElementById('2306.00322v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 131, 201802 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.01460">arXiv:2304.01460</a> <span> [<a href="https://arxiv.org/pdf/2304.01460">pdf</a>, <a href="https://arxiv.org/format/2304.01460">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.108.L041301">10.1103/PhysRevD.108.L041301 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for bosonic super-weakly interacting massive particles at COSINE-100 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Franca%2C+L+E">L. E. Franca</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Jo%2C+J+H">J. H. Jo</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+B+H">B. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a> , et al. (34 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2304.01460v2-abstract-short" style="display: inline;"> We present results of a search for bosonic super-weakly interacting massive particles (BSW) as keV scale dark matter candidates that is based on an exposure of 97.7 kg$\cdot$year from the COSINE experiment. In this search, we employ, for the first time, Compton-like as well as absorption processes for pseudoscalar and vector BSWs. No evidence for BSWs is found in the mass range from 10… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.01460v2-abstract-full').style.display = 'inline'; document.getElementById('2304.01460v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.01460v2-abstract-full" style="display: none;"> We present results of a search for bosonic super-weakly interacting massive particles (BSW) as keV scale dark matter candidates that is based on an exposure of 97.7 kg$\cdot$year from the COSINE experiment. In this search, we employ, for the first time, Compton-like as well as absorption processes for pseudoscalar and vector BSWs. No evidence for BSWs is found in the mass range from 10 $\mathrm{keV/c}^2$ to 1 $\mathrm{MeV/c}^2$, and we present the exclusion limits on the dimensionless coupling constants to electrons $g_{ae}$ for pseudoscalar and $魏$ for vector BSWs at 90% confidence level. Our results show that these limits are improved by including the Compton-like process in masses of BSW, above $\mathcal{O}(100\,\mathrm{keV/c}^2)$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.01460v2-abstract-full').style.display = 'none'; document.getElementById('2304.01460v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 108 (2023) L041301 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.13811">arXiv:2302.13811</a> <span> [<a href="https://arxiv.org/pdf/2302.13811">pdf</a>, <a href="https://arxiv.org/ps/2302.13811">ps</a>, <a href="https://arxiv.org/format/2302.13811">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Classical Analysis and ODEs">math.CA</span> </div> </div> <p class="title is-5 mathjax"> On an extension of generalized coherent pairs of orthogonal polynomials: the classical case </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Lee%2C+J+H">Jong Hwan Lee</a>, <a href="/search/?searchtype=author&query=An%2C+S+J">Sung Jun An</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hwan Yong Lee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.13811v1-abstract-short" style="display: inline;"> Given two quasi-definite moment functionals, the corresponding orthogonal polynomial systems satisfy an algebraic differential relation(called an extended coherent pair). We study generalizing extended coherent pairs that unify extended coherent pairs and extended symmetric coherent pairs and find the related coefficients. When one of the moment functionals is (strongly) classical, we find another… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.13811v1-abstract-full').style.display = 'inline'; document.getElementById('2302.13811v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.13811v1-abstract-full" style="display: none;"> Given two quasi-definite moment functionals, the corresponding orthogonal polynomial systems satisfy an algebraic differential relation(called an extended coherent pair). We study generalizing extended coherent pairs that unify extended coherent pairs and extended symmetric coherent pairs and find the related coefficients. When one of the moment functionals is (strongly) classical, we find another orthogonal polynomial system to find three-term recurrence coefficients. Moreover, we determine the companion moment functional as a rational modification of the classical one. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.13811v1-abstract-full').style.display = 'none'; document.getElementById('2302.13811v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.10267">arXiv:2302.10267</a> <span> [<a href="https://arxiv.org/pdf/2302.10267">pdf</a>, <a href="https://arxiv.org/format/2302.10267">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.107.122004">10.1103/PhysRevD.107.122004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for solar bosonic dark matter annual modulation with COSINE-100 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Fran%C3%A7a%2C+L+E">L. E. Fran莽a</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Jo%2C+J+H">J. H. Jo</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+B+H">B. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a> , et al. (34 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.10267v1-abstract-short" style="display: inline;"> We present results from a search for solar bosonic dark matter using the annual modulation method with the COSINE-100 experiment. The results were interpreted considering three dark sector bosons models: solar dark photon; DFSZ and KSVZ solar axion; and Kaluza-Klein solar axion. No modulation signal that is compatible with the expected from the models was found from a data-set of 2.82 yr, using 61… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.10267v1-abstract-full').style.display = 'inline'; document.getElementById('2302.10267v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.10267v1-abstract-full" style="display: none;"> We present results from a search for solar bosonic dark matter using the annual modulation method with the COSINE-100 experiment. The results were interpreted considering three dark sector bosons models: solar dark photon; DFSZ and KSVZ solar axion; and Kaluza-Klein solar axion. No modulation signal that is compatible with the expected from the models was found from a data-set of 2.82 yr, using 61.3 kg of NaI(Tl) crystals. Therefore, we set a 90$\%$ confidence level upper limits for each of the three models studied. For the solar dark photon model, the most stringent mixing parameter upper limit is $1.61 \times 10^{-14}$ for dark photons with a mass of 215 eV. For the DFSZ and KSVZ solar axion, and the Kaluza-Klein axion models, the upper limits exclude axion-electron couplings, $g_{ae}$, above $1.61 \times 10^{-11}$ for axion mass below 0.2 keV; and axion-photon couplings, $g_{a纬纬}$, above $1.83 \times 10^{-11}$ GeV$^{-1}$ for an axion number density of $4.07 \times 10^{13}$ cm$^{-3}$. This is the first experimental search for solar dark photons and DFSZ and KSVZ solar axions using the annual modulation method. The lower background, higher light yield and reduced threshold of NaI(Tl) crystals of the future COSINE-200 experiment are expected to enhance the sensitivity of the analysis shown in this paper. We show the sensitivities for the three models studied, considering the same search method with COSINE-200. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.10267v1-abstract-full').style.display = 'none'; document.getElementById('2302.10267v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 16 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2301.09312">arXiv:2301.09312</a> <span> [<a href="https://arxiv.org/pdf/2301.09312">pdf</a>, <a href="https://arxiv.org/format/2301.09312">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Hardware Architecture">cs.AR</span> </div> </div> <p class="title is-5 mathjax"> Enabling Hard Constraints in Differentiable Neural Network and Accelerator Co-Exploration </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Hong%2C+D">Deokki Hong</a>, <a href="/search/?searchtype=author&query=Choi%2C+K">Kanghyun Choi</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hye Yoon Lee</a>, <a href="/search/?searchtype=author&query=Yu%2C+J">Joonsang Yu</a>, <a href="/search/?searchtype=author&query=Park%2C+N">Noseong Park</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y">Youngsok Kim</a>, <a href="/search/?searchtype=author&query=Lee%2C+J">Jinho Lee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2301.09312v1-abstract-short" style="display: inline;"> Co-exploration of an optimal neural architecture and its hardware accelerator is an approach of rising interest which addresses the computational cost problem, especially in low-profile systems. The large co-exploration space is often handled by adopting the idea of differentiable neural architecture search. However, despite the superior search efficiency of the differentiable co-exploration, it f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.09312v1-abstract-full').style.display = 'inline'; document.getElementById('2301.09312v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.09312v1-abstract-full" style="display: none;"> Co-exploration of an optimal neural architecture and its hardware accelerator is an approach of rising interest which addresses the computational cost problem, especially in low-profile systems. The large co-exploration space is often handled by adopting the idea of differentiable neural architecture search. However, despite the superior search efficiency of the differentiable co-exploration, it faces a critical challenge of not being able to systematically satisfy hard constraints such as frame rate. To handle the hard constraint problem of differentiable co-exploration, we propose HDX, which searches for hard-constrained solutions without compromising the global design objectives. By manipulating the gradients in the interest of the given hard constraint, high-quality solutions satisfying the constraint can be obtained. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.09312v1-abstract-full').style.display = 'none'; document.getElementById('2301.09312v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">publisehd at DAC'22</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2208.05158">arXiv:2208.05158</a> <span> [<a href="https://arxiv.org/pdf/2208.05158">pdf</a>, <a href="https://arxiv.org/format/2208.05158">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41598-023-31688-4">10.1038/s41598-023-31688-4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> An induced annual modulation signature in COSINE-100 data by DAMA/LIBRA's analysis method </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Franca%2C+L+E">L. E. Franca</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Jo%2C+J+H">J. H. Jo</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+B+H">B. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+D+H">D. H. Lee</a> , et al. (32 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2208.05158v1-abstract-short" style="display: inline;"> The DAMA/LIBRA collaboration has reported the observation of an annual modulation in the event rate that has been attributed to dark matter interactions over the last two decades. However, even though tremendous efforts to detect similar dark matter interactions were pursued, no definitive evidence has been observed to corroborate the DAMA/LIBRA signal. Many studies assuming various dark matter mo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.05158v1-abstract-full').style.display = 'inline'; document.getElementById('2208.05158v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2208.05158v1-abstract-full" style="display: none;"> The DAMA/LIBRA collaboration has reported the observation of an annual modulation in the event rate that has been attributed to dark matter interactions over the last two decades. However, even though tremendous efforts to detect similar dark matter interactions were pursued, no definitive evidence has been observed to corroborate the DAMA/LIBRA signal. Many studies assuming various dark matter models have attempted to reconcile DAMA/LIBRA's modulation signals and null results from other experiments, however no clear conclusion can be drawn. Apart from the dark matter hypothesis, several studies have examined the possibility that the modulation is induced by variations in their detector's environment or their specific analysis methods. In particular, a recent study presents a possible cause of the annual modulation from an analysis method adopted by the DAMA/LIBRA experiment in which the observed annual modulation could be reproduced by a slowly varying time-dependent background. Here, we study the COSINE-100 data using an analysis method similar to the one adopted by the DAMA/LIBRA experiment and observe a significant annual modulation, although the modulation phase is almost opposite to that of the DAMA/LIBRA data. Assuming the same background composition for COSINE-100 and DAMA/LIBRA, simulated experiments for the DAMA/LIBRA without dark matter signals also provide significant annual modulation with an amplitude similar to DAMA/LIBRA with opposite phase. Even though this observation does not explain the DAMA/LIBRA's results directly, this interesting phenomenon motivates deeper studies of the time-dependent DAMA/LIBRA background data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.05158v1-abstract-full').style.display = 'none'; document.getElementById('2208.05158v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Sci. Rep. 13, 4676 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2205.00082">arXiv:2205.00082</a> <span> [<a href="https://arxiv.org/pdf/2205.00082">pdf</a>, <a href="https://arxiv.org/format/2205.00082">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2022.167666">10.1016/j.nima.2022.167666 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Implementation and validation of realistic (n,x) reaction yields in GEANT4 utilizing a detailed evaluated nuclear reaction library below 20 MeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Tsintari%2C+P">P. Tsintari</a>, <a href="/search/?searchtype=author&query=Perdikakis%2C+G">G. Perdikakis</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a>, <a href="/search/?searchtype=author&query=Kuvin%2C+S+A">S. A. Kuvin</a>, <a href="/search/?searchtype=author&query=Georgiadou%2C+A">A. Georgiadou</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+I">H. I. Kim</a>, <a href="/search/?searchtype=author&query=Votaw%2C+D">D. Votaw</a>, <a href="/search/?searchtype=author&query=Zavorka%2C+L">L. Zavorka</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2205.00082v1-abstract-short" style="display: inline;"> Neutron-induced reactions with charged particle emission play an important role in a variety of research fields ranging from fundamental nuclear physics and nuclear astrophysics to applications of nuclear technologies to energy production and material science. Recently, the capability to study reactions with radioactive targets has become important to significantly advance research in explosive nu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.00082v1-abstract-full').style.display = 'inline'; document.getElementById('2205.00082v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2205.00082v1-abstract-full" style="display: none;"> Neutron-induced reactions with charged particle emission play an important role in a variety of research fields ranging from fundamental nuclear physics and nuclear astrophysics to applications of nuclear technologies to energy production and material science. Recently, the capability to study reactions with radioactive targets has become important to significantly advance research in explosive nucleosynthesis and nuclear applications. To achieve the relevant research goals and study (n,x) reactions over a broad neutron beam energy range, the Low Energy Neutron-induced charged-particle (Z) chamber (LENZ) at Los Alamos Neutron Science Center (LANSCE) was developed along with varied ancillary instrumentation to enable the aforementioned research program. For the (n,x) reactions of interest at low energies, a precise simulation of the discrete spectrum of emitted charged particles is essential. In addition, since LANSCE is a user facility, a simulation application that can be easily accessible by users has high value. With these goals in mind, we have developed a detailed simulation using the GEANT4 toolkit. In this work, we present the implementation and the validation of the simulation using experimental data from recent campaigns with the LENZ instrument. Specifically, we benchmark the simulation against a similar MCNP-based tool and determine the realistic range of applicability for the probability biasing technique used. We describe our implementation of an evaluated library with angular distribution and partial cross-section data, and we perform a validation of the application based on comparisons of simulated spectra with the experimental ones, for a number of targets used in previous experimental campaigns. Last, we discuss the limitations, caveats, and assets of the simulation code and techniques used. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.00082v1-abstract-full').style.display = 'none'; document.getElementById('2205.00082v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 11 figures. Submitted to Nuclear Instruments and Methods A</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.17008">arXiv:2203.17008</a> <span> [<a href="https://arxiv.org/pdf/2203.17008">pdf</a>, <a href="https://arxiv.org/format/2203.17008">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computer Vision and Pattern Recognition">cs.CV</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</span> </div> </div> <p class="title is-5 mathjax"> It's All In the Teacher: Zero-Shot Quantization Brought Closer to the Teacher </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Choi%2C+K">Kanghyun Choi</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hye Yoon Lee</a>, <a href="/search/?searchtype=author&query=Hong%2C+D">Deokki Hong</a>, <a href="/search/?searchtype=author&query=Yu%2C+J">Joonsang Yu</a>, <a href="/search/?searchtype=author&query=Park%2C+N">Noseong Park</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y">Youngsok Kim</a>, <a href="/search/?searchtype=author&query=Lee%2C+J">Jinho Lee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.17008v2-abstract-short" style="display: inline;"> Model quantization is considered as a promising method to greatly reduce the resource requirements of deep neural networks. To deal with the performance drop induced by quantization errors, a popular method is to use training data to fine-tune quantized networks. In real-world environments, however, such a method is frequently infeasible because training data is unavailable due to security, privac… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.17008v2-abstract-full').style.display = 'inline'; document.getElementById('2203.17008v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.17008v2-abstract-full" style="display: none;"> Model quantization is considered as a promising method to greatly reduce the resource requirements of deep neural networks. To deal with the performance drop induced by quantization errors, a popular method is to use training data to fine-tune quantized networks. In real-world environments, however, such a method is frequently infeasible because training data is unavailable due to security, privacy, or confidentiality concerns. Zero-shot quantization addresses such problems, usually by taking information from the weights of a full-precision teacher network to compensate the performance drop of the quantized networks. In this paper, we first analyze the loss surface of state-of-the-art zero-shot quantization techniques and provide several findings. In contrast to usual knowledge distillation problems, zero-shot quantization often suffers from 1) the difficulty of optimizing multiple loss terms together, and 2) the poor generalization capability due to the use of synthetic samples. Furthermore, we observe that many weights fail to cross the rounding threshold during training the quantized networks even when it is necessary to do so for better performance. Based on the observations, we propose AIT, a simple yet powerful technique for zero-shot quantization, which addresses the aforementioned two problems in the following way: AIT i) uses a KL distance loss only without a cross-entropy loss, and ii) manipulates gradients to guarantee that a certain portion of weights are properly updated after crossing the rounding thresholds. Experiments show that AIT outperforms the performance of many existing methods by a great margin, taking over the overall state-of-the-art position in the field. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.17008v2-abstract-full').style.display = 'none'; document.getElementById('2203.17008v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">selected for an oral presentation at CVPR 2022</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.08034">arXiv:2201.08034</a> <span> [<a href="https://arxiv.org/pdf/2201.08034">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2022.167123">10.1016/j.nima.2022.167123 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A feasibility study of extruded plastic scintillator embedding WLS fiber for AMoRE-II muon veto </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Seo%2C+J+W">J. W. Seo</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+T">W. T. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+J">J. Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+M+H">M. H. Lee</a>, <a href="/search/?searchtype=author&query=Nyanda%2C+P+B">P. B. Nyanda</a>, <a href="/search/?searchtype=author&query=Yi%2C+E+S">E. S. Yi</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2201.08034v2-abstract-short" style="display: inline;"> AMoRE-II is the second phase of the Advanced Molybdenum-based Rare process Experiment aiming to search for the neutrino-less double beta decay of 100Mo isotopes using ~ 200 kg of molybdenum-containing cryogenic detectors. The AMoRE-II needs to keep the background level below 10-5 counts/keV/kg/year with various methods to maximize the sensitivity. One of the methods is to have the experiment be ca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.08034v2-abstract-full').style.display = 'inline'; document.getElementById('2201.08034v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.08034v2-abstract-full" style="display: none;"> AMoRE-II is the second phase of the Advanced Molybdenum-based Rare process Experiment aiming to search for the neutrino-less double beta decay of 100Mo isotopes using ~ 200 kg of molybdenum-containing cryogenic detectors. The AMoRE-II needs to keep the background level below 10-5 counts/keV/kg/year with various methods to maximize the sensitivity. One of the methods is to have the experiment be carried out deep underground free from the cosmic ray backgrounds. The AMoRE-II will run at Yemilab with ~ 1,000 m depth. However, even in such a deep underground environment, there are still survived cosmic muons, which can affect the measurement and should be excluded as much as possible. A muon veto detector is necessary to reject muon-induced particles coming to the inner detector where the molybdate cryogenic detectors are located. We have studied the possibility of using an extruded plastic scintillator and wavelength shifting fiber together with SiPM as a muon veto system. We found that the best configuration is two layers of plastic scintillators (PSs, 150 cm x 25 cm x 1.2 cm) with two WLS fibers per groove, which could separate radiogenic gammas well with muon detection efficiency above 99.4% along the length of the PS. Based on the expected flux from a prototype measurement at a 700 m deep underground, we found that the dead time of the muon veto system for AMoRE-II at the Yemilab with a 1 ms veto window is 0.6% of whole muon events. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.08034v2-abstract-full').style.display = 'none'; document.getElementById('2201.08034v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 7 figures, 2 tables, accepted for publication at NIMA</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.02142">arXiv:2201.02142</a> <span> [<a href="https://arxiv.org/pdf/2201.02142">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.nanolett.2c01682">10.1021/acs.nanolett.2c01682 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Mechanisms of quasi-van der Waals epitaxy of 3D metallic nanoislands on suspended 2D materials </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Reidy%2C+K">Kate Reidy</a>, <a href="/search/?searchtype=author&query=Thomsen%2C+J+D">Joachim Dahl Thomsen</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hae Yeon Lee</a>, <a href="/search/?searchtype=author&query=Zarubin%2C+V">Vera Zarubin</a>, <a href="/search/?searchtype=author&query=Yu%2C+Y">Yang Yu</a>, <a href="/search/?searchtype=author&query=Wang%2C+B">Baoming Wang</a>, <a href="/search/?searchtype=author&query=Pham%2C+T">Thang Pham</a>, <a href="/search/?searchtype=author&query=Periwal%2C+P">Priyanka Periwal</a>, <a href="/search/?searchtype=author&query=Ross%2C+F+M">Frances M. Ross</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2201.02142v2-abstract-short" style="display: inline;"> Understanding structure at the interface between two-dimensional (2D) materials and 3D metals is crucial for designing novel 2D/3D heterostructures and improving the performance of many 2D material devices. Here, we quantify and discuss the 2D/3D interface structure and the 3D morphology in several materials systems. We first deposit facetted Au nanoislands on graphene and transition metal dichalc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.02142v2-abstract-full').style.display = 'inline'; document.getElementById('2201.02142v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.02142v2-abstract-full" style="display: none;"> Understanding structure at the interface between two-dimensional (2D) materials and 3D metals is crucial for designing novel 2D/3D heterostructures and improving the performance of many 2D material devices. Here, we quantify and discuss the 2D/3D interface structure and the 3D morphology in several materials systems. We first deposit facetted Au nanoislands on graphene and transition metal dichalcogenides, using measurements of the equilibrium island shape to determine values for the 2D/Au interface energies and examining the role of surface reconstructions, chemical identity, and defects on the grown structures. We then deposit the technologically relevant metals Ti and Nb under conditions where kinetic rather than thermodynamic factors govern growth. We describe a transition from dendritic to facetted islands as a function of growth temperature and discuss the factors determining island shape in these materials systems. Finally, we show that suspended 2D materials enable the fabrication of a novel type of 3D/2D/3D heterostructure and discuss the growth mechanism. We suggest that emerging nanodevices will utilize such versatile fabrication of 2D/3D heterostructures with well-characterized interfaces and morphologies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.02142v2-abstract-full').style.display = 'none'; document.getElementById('2201.02142v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.08863">arXiv:2111.08863</a> <span> [<a href="https://arxiv.org/pdf/2111.08863">pdf</a>, <a href="https://arxiv.org/format/2111.08863">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.106.052005">10.1103/PhysRevD.106.052005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Three-year annual modulation search with COSINE-100 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Collaboration%2C+C">COSINE-100 Collaboration</a>, <a href="/search/?searchtype=author&query=%3A"> :</a>, <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=de+Souza%2C+E+B">E. Barbosa de Souza</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Fran%C3%A7a%2C+L+E">L. E. Fran莽a</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Jo%2C+J+H">J. H. Jo</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+H">H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a> , et al. (34 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2111.08863v2-abstract-short" style="display: inline;"> COSINE-100 is a direct detection dark matter experiment that aims to test DAMA/LIBRA's claim of dark matter discovery by searching for a dark matter-induced annual modulation signal with NaI(Tl) detectors. We present new constraints on the annual modulation signal from a dataset with a 2.82 yr livetime utilizing an active mass of 61.3 kg, for a total exposure of 173 kg$\cdot$yr. This new result fe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.08863v2-abstract-full').style.display = 'inline'; document.getElementById('2111.08863v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.08863v2-abstract-full" style="display: none;"> COSINE-100 is a direct detection dark matter experiment that aims to test DAMA/LIBRA's claim of dark matter discovery by searching for a dark matter-induced annual modulation signal with NaI(Tl) detectors. We present new constraints on the annual modulation signal from a dataset with a 2.82 yr livetime utilizing an active mass of 61.3 kg, for a total exposure of 173 kg$\cdot$yr. This new result features an improved event selection that allows for both lowering the energy threshold to 1 keV and a more precise time-dependent background model. In the 1-6 keV and 2-6 keV energy intervals, we observe best-fit values for the modulation amplitude of 0.0067$\pm$0.0042 and 0.0051$\pm$0.0047 counts/(day$\cdot$kg$\cdot$keV), respectively, with a phase fixed at 152.5 days. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.08863v2-abstract-full').style.display = 'none'; document.getElementById('2111.08863v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 106, 052005 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.05806">arXiv:2110.05806</a> <span> [<a href="https://arxiv.org/pdf/2110.05806">pdf</a>, <a href="https://arxiv.org/format/2110.05806">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.105.042006">10.1103/PhysRevD.105.042006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Searching for low-mass dark matter via Migdal effect in COSINE-100 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Franca%2C+L+E">L. E. Franca</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Hollick%2C+S+J">S. J. Hollick</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Jo%2C+J+H">J. H. Jo</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+H">H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+J">J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Kwon%2C+H+J">H. J. Kwon</a> , et al. (31 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.05806v2-abstract-short" style="display: inline;"> We report on the search for weakly interacting massive particle (WIMP) dark matter candidates in the galactic halo that interact with sodium and iodine nuclei in the COSINE-100 experiment and produce energetic electrons that accompany recoil nuclei via the the Migdal effect. The WIMP mass sensitivity of previous COSINE-100 searches that relied on the detection of ionization signals produced by tar… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.05806v2-abstract-full').style.display = 'inline'; document.getElementById('2110.05806v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.05806v2-abstract-full" style="display: none;"> We report on the search for weakly interacting massive particle (WIMP) dark matter candidates in the galactic halo that interact with sodium and iodine nuclei in the COSINE-100 experiment and produce energetic electrons that accompany recoil nuclei via the the Migdal effect. The WIMP mass sensitivity of previous COSINE-100 searches that relied on the detection of ionization signals produced by target nuclei recoiling from elastic WIMP-nucleus scattering was restricted to WIMP masses above $\sim$5 GeV/$c^2$ by the detectors' 1 keVee energy-electron-equivalent threshold. The search reported here looks for recoil signals enhanced by the Migdal electrons that are ejected during the scattering process. This is particularly effective for the detection of low-mass WIMP scattering from the crystals' sodium nuclei in which a relatively larger fraction of the WIMP's energy is transferred to the nucleus recoil energy and the excitation of its orbital electrons. In this analysis, the low-mass WIMP search window of the COSINE-100 experiment is extended to WIMP mass down to 200 MeV/$c^2$. The low-mass WIMP sensitivity will be further improved by lowering the analysis threshold based on a multivariable analysis technique. We consider the influence of these improvements and recent developments in detector performance to re-evaluate sensitivities for the future COSINE-200 experiment. With a 0.2 keVee analysis threshold and high light-yield NaI(Tl) detectors (22 photoelectrons/keVee), the COSINE-200 experiment can explore low-mass WIMPs down to 20 MeV/$c^2$ and probe previously unexplored regions of parameter space. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.05806v2-abstract-full').style.display = 'none'; document.getElementById('2110.05806v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 105, 042006 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.03306">arXiv:2110.03306</a> <span> [<a href="https://arxiv.org/pdf/2110.03306">pdf</a>, <a href="https://arxiv.org/format/2110.03306">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/17/02/P02027">10.1088/1748-0221/17/02/P02027 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Scintillation characteristics of a NaI(Tl) crystal at low-temperature with silicon photomultiplier </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a>, <a href="/search/?searchtype=author&query=Jeon%2C+J+A">J. A. Jeon</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+S">H. S. Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+M+H">M. H. Lee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.03306v1-abstract-short" style="display: inline;"> Scintillation characteristics of a thallium doped sodium iodide (NaI(Tl)) crystal with a dimension of 0.6 x 0.6 x 2 cm3 are studied by attaching a silicon photomultiplier (SiPM) direct to the crystal over a temperature range from 93 to 300 K. The scintillation light output and decay time are measured by irradiating 59.54 keV gamma-rays from a 241Am source. We observed approximately 20% increase in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.03306v1-abstract-full').style.display = 'inline'; document.getElementById('2110.03306v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.03306v1-abstract-full" style="display: none;"> Scintillation characteristics of a thallium doped sodium iodide (NaI(Tl)) crystal with a dimension of 0.6 x 0.6 x 2 cm3 are studied by attaching a silicon photomultiplier (SiPM) direct to the crystal over a temperature range from 93 to 300 K. The scintillation light output and decay time are measured by irradiating 59.54 keV gamma-rays from a 241Am source. We observed approximately 20% increase in light yield at 230K compared to that at the room temperature. At this condition, the NaI(Tl) crystal coupled with the SiPM can be a good candidate for future dark matter search detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.03306v1-abstract-full').style.display = 'none'; document.getElementById('2110.03306v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.07655">arXiv:2107.07655</a> <span> [<a href="https://arxiv.org/pdf/2107.07655">pdf</a>, <a href="https://arxiv.org/format/2107.07655">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/17/01/T01001">10.1088/1748-0221/17/01/T01001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The environmental monitoring system at the COSINE-100 experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Kim%2C+H">H. Kim</a>, <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=de+Souza%2C+E+B">E. Barbosa de Souza</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Djamal%2C+M">M. Djamal</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Fran%C3%A7a%2C+L+E">L. E. Fran莽a</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Jo%2C+J+H">J. H. Jo</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+E+K">E. K. Lee</a> , et al. (28 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2107.07655v3-abstract-short" style="display: inline;"> The COSINE-100 experiment is designed to test the DAMA experiment which claimed an observation of a dark matter signal from an annual modulation in their residual event rate. To measure the 1 %-level signal amplitude, it is crucial to control and monitor nearly all environmental quantities that might systematically mimic the signal. The environmental monitoring also helps ensure a stable operation… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.07655v3-abstract-full').style.display = 'inline'; document.getElementById('2107.07655v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.07655v3-abstract-full" style="display: none;"> The COSINE-100 experiment is designed to test the DAMA experiment which claimed an observation of a dark matter signal from an annual modulation in their residual event rate. To measure the 1 %-level signal amplitude, it is crucial to control and monitor nearly all environmental quantities that might systematically mimic the signal. The environmental monitoring also helps ensure a stable operation of the experiment. Here, we describe the design and performance of the centralized environmental monitoring system for the COSINE-100 experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.07655v3-abstract-full').style.display = 'none'; document.getElementById('2107.07655v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 11 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.03537">arXiv:2104.03537</a> <span> [<a href="https://arxiv.org/pdf/2104.03537">pdf</a>, <a href="https://arxiv.org/format/2104.03537">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1126/sciadv.abk2699">10.1126/sciadv.abk2699 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Strong constraints from COSINE-100 on the DAMA dark matter results using the same sodium iodide target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=de+Souza%2C+E+B">E. Barbosa de Souza</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Djamal%2C+M">M. Djamal</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Fran%C3%A7a%2C+L+E">L. E. Fran莽a</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Jo%2C+J+H">J. H. Jo</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+H">H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+E+K">E. K. Lee</a> , et al. (28 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2104.03537v2-abstract-short" style="display: inline;"> We present new constraints on dark matter interactions using 1.7 years of COSINE-100 data. The COSINE-100 experiment, consisting of 106 kg of tallium-doped sodium iodide (NaI(Tl)) target material, is aimed at testing DAMA's claim of dark matter observation using the same NaI(Tl) detectors. Improved event selection requirements, a more precise understanding of the detector background and the use of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.03537v2-abstract-full').style.display = 'inline'; document.getElementById('2104.03537v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.03537v2-abstract-full" style="display: none;"> We present new constraints on dark matter interactions using 1.7 years of COSINE-100 data. The COSINE-100 experiment, consisting of 106 kg of tallium-doped sodium iodide (NaI(Tl)) target material, is aimed at testing DAMA's claim of dark matter observation using the same NaI(Tl) detectors. Improved event selection requirements, a more precise understanding of the detector background and the use of a larger data set considerably enhances the COSINE-100 sensitivity for dark matter detection. No signal consistent with the dark matter interaction is identified, and rules out model-dependent dark matter interpretations of the DAMA signals in the specific context of standard halo model with the same NaI(Tl) target for various interaction hypotheses. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.03537v2-abstract-full').style.display = 'none'; document.getElementById('2104.03537v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Sci. Adv. 7, eabk2699 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.02809">arXiv:2103.02809</a> <span> [<a href="https://arxiv.org/pdf/2103.02809">pdf</a>, <a href="https://arxiv.org/format/2103.02809">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-021-09473-2">10.1140/epjc/s10052-021-09473-2 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Identification of new isomers in $^{228}$Ac : Impact on dark matter searches </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Kim%2C+K+W">K. W. Kim</a>, <a href="/search/?searchtype=author&query=Adhikari%2C+G">G. Adhikari</a>, <a href="/search/?searchtype=author&query=de+Souza%2C+E+B">E. Barbosa de Souza</a>, <a href="/search/?searchtype=author&query=Carlin%2C+N">N. Carlin</a>, <a href="/search/?searchtype=author&query=Choi%2C+J+J">J. J. Choi</a>, <a href="/search/?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/?searchtype=author&query=Djamal%2C+M">M. Djamal</a>, <a href="/search/?searchtype=author&query=Ezeribe%2C+A+C">A. C. Ezeribe</a>, <a href="/search/?searchtype=author&query=Franca%2C+L+E">L. E. Franca</a>, <a href="/search/?searchtype=author&query=Ha%2C+C">C. Ha</a>, <a href="/search/?searchtype=author&query=Hahn%2C+I+S">I. S. Hahn</a>, <a href="/search/?searchtype=author&query=Jeon%2C+E+J">E. J. Jeon</a>, <a href="/search/?searchtype=author&query=Jo%2C+J+H">J. H. Jo</a>, <a href="/search/?searchtype=author&query=Joo%2C+H+W">H. W. Joo</a>, <a href="/search/?searchtype=author&query=Kang%2C+W+G">W. G. Kang</a>, <a href="/search/?searchtype=author&query=Kauer%2C+M">M. Kauer</a>, <a href="/search/?searchtype=author&query=Kim%2C+H">H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+H">S. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+S+K">S. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+W+K">W. K. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+D">Y. D. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+Y+H">Y. H. Kim</a>, <a href="/search/?searchtype=author&query=Ko%2C+Y+J">Y. J. Ko</a>, <a href="/search/?searchtype=author&query=Lee%2C+E+K">E. K. Lee</a> , et al. (28 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2103.02809v3-abstract-short" style="display: inline;"> We report the identification of metastable isomeric states of $^{228}$Ac at 6.28 keV, 6.67 keV and 20.19 keV, with lifetimes of an order of 100 ns. These states are produced by the $尾$-decay of $^{228}$Ra, a component of the $^{232}$Th decay chain, with $尾$ Q-values of 39.52 keV, 39.13 keV and 25.61 keV, respectively. Due to its low Q-value as well as the relative abundance of $^{232}$Th and their… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.02809v3-abstract-full').style.display = 'inline'; document.getElementById('2103.02809v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.02809v3-abstract-full" style="display: none;"> We report the identification of metastable isomeric states of $^{228}$Ac at 6.28 keV, 6.67 keV and 20.19 keV, with lifetimes of an order of 100 ns. These states are produced by the $尾$-decay of $^{228}$Ra, a component of the $^{232}$Th decay chain, with $尾$ Q-values of 39.52 keV, 39.13 keV and 25.61 keV, respectively. Due to its low Q-value as well as the relative abundance of $^{232}$Th and their progeny in low background experiments, these observations potentially impact the low-energy background modeling of dark matter search experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.02809v3-abstract-full').style.display = 'none'; document.getElementById('2103.02809v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 9 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 81 (2021) 746 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2102.06140">arXiv:2102.06140</a> <span> [<a href="https://arxiv.org/pdf/2102.06140">pdf</a>, <a href="https://arxiv.org/format/2102.06140">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.nanolett.1c02600">10.1021/acs.nanolett.1c02600 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nanoscale modification of WS$_2$ trion emission by its local electromagnetic environment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Bonnet%2C+N">No茅mie Bonnet</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hae Yeon Lee</a>, <a href="/search/?searchtype=author&query=Shao%2C+F">Fuhui Shao</a>, <a href="/search/?searchtype=author&query=Woo%2C+S+Y">Steffi Y. Woo</a>, <a href="/search/?searchtype=author&query=Blazit%2C+J">Jean-Denis Blazit</a>, <a href="/search/?searchtype=author&query=Watanabe%2C+K">Kenji Watanabe</a>, <a href="/search/?searchtype=author&query=Taniguchi%2C+T">Takashi Taniguchi</a>, <a href="/search/?searchtype=author&query=Zobelli%2C+A">Alberto Zobelli</a>, <a href="/search/?searchtype=author&query=St%C3%A9phan%2C+O">Odile St茅phan</a>, <a href="/search/?searchtype=author&query=Kociak%2C+M">Mathieu Kociak</a>, <a href="/search/?searchtype=author&query=Gradecak-Garaj%2C+S">Silvija Gradecak-Garaj</a>, <a href="/search/?searchtype=author&query=Tizei%2C+L+H+G">Luiz H. G. Tizei</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2102.06140v2-abstract-short" style="display: inline;"> Structural, electronic, and chemical nanoscale modifications of transition metal dichalcogenide monolayers alter their optical properties, including the generation of single photon emitters. A key missing element for complete control is a direct spatial correlation of optical response to nanoscale modifications, due to the large gap in spatial resolution between optical spectroscopy and nanometer… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.06140v2-abstract-full').style.display = 'inline'; document.getElementById('2102.06140v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2102.06140v2-abstract-full" style="display: none;"> Structural, electronic, and chemical nanoscale modifications of transition metal dichalcogenide monolayers alter their optical properties, including the generation of single photon emitters. A key missing element for complete control is a direct spatial correlation of optical response to nanoscale modifications, due to the large gap in spatial resolution between optical spectroscopy and nanometer resolved techniques, such as transmission electron microscopy or scanning tunneling microscopy. Here, we bridge this gap by obtaining nanometer resolved optical properties using electron spectroscopy, specifically electron energy loss spectroscopy (EELS) for absorption and cathodoluminescence (CL) for emission, which were directly correlated to chemical and structural information. In an h-BN/WS$_2$/h-BN heterostructure, we observe local modulation of the trion (X$^{-}$) emission due to tens of nanometer wide dielectric patches, while the exciton, X$_A$, does not follow the same modulation. Trion emission also increases in regions where charge accumulation occurs, close to the carbon film supporting the heterostructures. Finally, localized exciton emission (L) detection is not correlated to strain variations above 1 $\%$, suggesting point defects might be involved in their formations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.06140v2-abstract-full').style.display = 'none'; document.getElementById('2102.06140v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2012.03937">arXiv:2012.03937</a> <span> [<a href="https://arxiv.org/pdf/2012.03937">pdf</a>, <a href="https://arxiv.org/format/2012.03937">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Physics and Society">physics.soc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevApplied.15.054026">10.1103/PhysRevApplied.15.054026 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Neutron Resonance Transmission Analysis with a Compact Deuterium-Tritium Neutron Generator </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Klein%2C+E+A">Ethan A. Klein</a>, <a href="/search/?searchtype=author&query=Naqvi%2C+F">Farheen Naqvi</a>, <a href="/search/?searchtype=author&query=Bickus%2C+J+E">Jacob E. Bickus</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hin Y. Lee</a>, <a href="/search/?searchtype=author&query=Goldston%2C+R+J">Robert J. Goldston</a>, <a href="/search/?searchtype=author&query=Danagoulian%2C+A">Areg Danagoulian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2012.03937v3-abstract-short" style="display: inline;"> Neutron Resonance Transmission Analysis (NRTA) is a spectroscopic technique which uses the resonant absorption of neutrons in the epithermal range to infer the isotopic composition of an object. This spectroscopic technique has relevance in many traditional fields of science and nuclear security. NRTA in the past made use of large, expensive accelerator facilities to achieve precise neutron beams,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.03937v3-abstract-full').style.display = 'inline'; document.getElementById('2012.03937v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.03937v3-abstract-full" style="display: none;"> Neutron Resonance Transmission Analysis (NRTA) is a spectroscopic technique which uses the resonant absorption of neutrons in the epithermal range to infer the isotopic composition of an object. This spectroscopic technique has relevance in many traditional fields of science and nuclear security. NRTA in the past made use of large, expensive accelerator facilities to achieve precise neutron beams, significantly limiting its applicability. In this work we describe a series of NRTA experiments where we use a compact, low-cost deuterium-tritium (DT) neutron generator to produce short neutron beams (2.6~m) along with a $^6$Li-glass neutron detector. The time-of-flight spectral data from five elements -- silver, cadmium, tungsten, indium, and $^{238}$U -- clearly show the corresponding absorption lines in the 1-30 eV range. The experiments show the applicability of NRTA in this simplified configuration, and prove the feasibility of this compact and low-cost approach. This could significantly broaden the applicability of NRTA, and make it practical and applicable in many fields, such as material science, nuclear engineering, and arms control. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.03937v3-abstract-full').style.display = 'none'; document.getElementById('2012.03937v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Applied 15, 054026 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.07961">arXiv:2010.07961</a> <span> [<a href="https://arxiv.org/pdf/2010.07961">pdf</a>, <a href="https://arxiv.org/format/2010.07961">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epja/s10050-020-00295-6">10.1140/epja/s10050-020-00295-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Total kinetic energy and mass yields from the fast neutron-induced fission of $^{239}$Pu </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Chemey%2C+A">Alexander Chemey</a>, <a href="/search/?searchtype=author&query=Pica%2C+A">Ashley Pica</a>, <a href="/search/?searchtype=author&query=Yao%2C+L">Liangyu Yao</a>, <a href="/search/?searchtype=author&query=Loveland%2C+W">Walter Loveland</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hye Young Lee</a>, <a href="/search/?searchtype=author&query=Kuvin%2C+S+A">S. A. Kuvin</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.07961v1-abstract-short" style="display: inline;"> The total kinetic energy (TKE) release in fission is an important observable, constituting over 80% of the energy released in fission (E$_{f}$ $\approx$ 200 MeV). While the TKE release in the $^{239}$Pu(n,f) reaction was previously measured up to 50 MeV incident neutron energy (E$_{n}$), there were features in TKE release at the highest values of E$_{n}$ that were puzzling. There was a marked flat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.07961v1-abstract-full').style.display = 'inline'; document.getElementById('2010.07961v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.07961v1-abstract-full" style="display: none;"> The total kinetic energy (TKE) release in fission is an important observable, constituting over 80% of the energy released in fission (E$_{f}$ $\approx$ 200 MeV). While the TKE release in the $^{239}$Pu(n,f) reaction was previously measured up to 50 MeV incident neutron energy (E$_{n}$), there were features in TKE release at the highest values of E$_{n}$ that were puzzling. There was a marked flattening of TKE release from E$_{n}$ = 30 to 50 MeV, in disagreement with the clearly decreasing TKE observed from E$_{n}$ = 0.5 to 30 MeV. To verify and clarify this trend, TKE measurements at higher values of E$_n$ were made. We present absolute measurements of TKE release in $^{239}$Pu(n,f) from E$_{n}$ = 2.4 to 100 MeV. We used silicon PIN detectors to measure the fragment energies and deduce mass-yield curves using the 2E-method. We also discuss fission asymmetry and the relationships between approximate fission fragment mass and distortion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.07961v1-abstract-full').style.display = 'none'; document.getElementById('2010.07961v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, Submitted to European Physical Journal A</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.06484">arXiv:2010.06484</a> <span> [<a href="https://arxiv.org/pdf/2010.06484">pdf</a>, <a href="https://arxiv.org/format/2010.06484">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.102.064612">10.1103/PhysRevC.102.064612 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Total kinetic energy release in the fast neutron-induced fission of 237Np </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Pica%2C+A">A. Pica</a>, <a href="/search/?searchtype=author&query=Chemey%2C+A+T">A. T. Chemey</a>, <a href="/search/?searchtype=author&query=Yao%2C+L">L. Yao</a>, <a href="/search/?searchtype=author&query=Loveland%2C+W">W. Loveland</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a>, <a href="/search/?searchtype=author&query=Kuvin%2C+S+A">S. A. Kuvin</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.06484v1-abstract-short" style="display: inline;"> The total kinetic energy (TKE) in the fast neutron induced fission of 237Np was measured for neutron energies from En = 2.6 - 100 MeV at the LANSCE-WNR facility. The post TKE release decreases non-linearly with increasing incident neutron energy and can be represented as TKE(MeV) = (174.38 +- 0.72) - (5.11 +- 0.5821) log10 En for En > 1 MeV. Analysis of the fragment mass distributions indicates th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.06484v1-abstract-full').style.display = 'inline'; document.getElementById('2010.06484v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.06484v1-abstract-full" style="display: none;"> The total kinetic energy (TKE) in the fast neutron induced fission of 237Np was measured for neutron energies from En = 2.6 - 100 MeV at the LANSCE-WNR facility. The post TKE release decreases non-linearly with increasing incident neutron energy and can be represented as TKE(MeV) = (174.38 +- 0.72) - (5.11 +- 0.5821) log10 En for En > 1 MeV. Analysis of the fragment mass distributions indicates that the decrease in TKE with increasing En is a consequence of two factors; shell effects fade out at high excitation energies, resulting in the increasing occurrence of symmetric fission, and TKEasym decreases rapidly at high En. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.06484v1-abstract-full').style.display = 'none'; document.getElementById('2010.06484v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 102, 064612 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.06044">arXiv:2010.06044</a> <span> [<a href="https://arxiv.org/pdf/2010.06044">pdf</a>, <a href="https://arxiv.org/ps/2010.06044">ps</a>, <a href="https://arxiv.org/format/2010.06044">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nimb.2020.12.020">10.1016/j.nimb.2020.12.020 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> An accelerator facility for intermediate energy proton irradiation and testing of nuclear materials </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Jepeal%2C+S+J">S. J. Jepeal</a>, <a href="/search/?searchtype=author&query=Danagoulian%2C+A">A. Danagoulian</a>, <a href="/search/?searchtype=author&query=Kesler%2C+L+A">L. A. Kesler</a>, <a href="/search/?searchtype=author&query=Korsun%2C+D+A">D. A. Korsun</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a>, <a href="/search/?searchtype=author&query=Schwartz%2C+N">N. Schwartz</a>, <a href="/search/?searchtype=author&query=Sorbom%2C+B+N">B. N. Sorbom</a>, <a href="/search/?searchtype=author&query=Lopez%2C+E+V">E. Velez Lopez</a>, <a href="/search/?searchtype=author&query=Hartwig%2C+Z+S">Z. S. Hartwig</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.06044v2-abstract-short" style="display: inline;"> The bulk irradiation of materials with 10-30 MeV protons promises to advance the study of radiation damage for fission and fusion power plants. Intermediate energy proton beams can now be dedicated to materials irradiation within university-scale laboratories. This paper describes the first such facility, with an Ionetix ION-12SC cyclotron producing 12 MeV proton beams. Samples are mm-scale tensil… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.06044v2-abstract-full').style.display = 'inline'; document.getElementById('2010.06044v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.06044v2-abstract-full" style="display: none;"> The bulk irradiation of materials with 10-30 MeV protons promises to advance the study of radiation damage for fission and fusion power plants. Intermediate energy proton beams can now be dedicated to materials irradiation within university-scale laboratories. This paper describes the first such facility, with an Ionetix ION-12SC cyclotron producing 12 MeV proton beams. Samples are mm-scale tensile specimens with thicknesses up to 300 um, mounted to a cooled beam target with control over temperature. A specialized tensile tester for radioactive specimens at high temperature (500+ 掳C) and/or vacuum represents the conditions in fission and fusion systems, while a digital image correlation system remotely measures strain. Overall, the facility provides university-scale irradiation and testing capability with intermediate energy protons to complement traditional in-core fission reactor and micro-scale ion irradiation. This facility demonstrates that bulk proton irradiation is a scalable and effective approach for nuclear materials research, down-selection, and qualification. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.06044v2-abstract-full').style.display = 'none'; document.getElementById('2010.06044v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted to NIM B journal</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.00024">arXiv:2006.00024</a> <span> [<a href="https://arxiv.org/pdf/2006.00024">pdf</a>, <a href="https://arxiv.org/format/2006.00024">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.102.034601">10.1103/PhysRevC.102.034601 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Isotopically resolved neutron total cross sections at intermediate energies </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Pruitt%2C+C+D">C. D. Pruitt</a>, <a href="/search/?searchtype=author&query=Charity%2C+R+J">R. J. Charity</a>, <a href="/search/?searchtype=author&query=Sobotka%2C+L+G">L. G. Sobotka</a>, <a href="/search/?searchtype=author&query=Elson%2C+J+M">J. M. Elson</a>, <a href="/search/?searchtype=author&query=Hoff%2C+D+E+M">D. E. M. Hoff</a>, <a href="/search/?searchtype=author&query=Brown%2C+K+W">K. W. Brown</a>, <a href="/search/?searchtype=author&query=Atkinson%2C+M+C">M. C. Atkinson</a>, <a href="/search/?searchtype=author&query=Dickhoff%2C+W+H">W. H. Dickhoff</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a>, <a href="/search/?searchtype=author&query=Devlin%2C+M">M. Devlin</a>, <a href="/search/?searchtype=author&query=Fotiades%2C+N">N. Fotiades</a>, <a href="/search/?searchtype=author&query=Mosby%2C+S">S. Mosby</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.00024v2-abstract-short" style="display: inline;"> The neutron total cross sections $蟽_{tot}$ of $^{16,18}$O, $^{58,64}$Ni, $^{103}$Rh, and $^{112,124}$Sn have been measured at the Los Alamos Neutron Science Center (LANSCE) from low to intermediate energies (3 $\leq E_{lab} \leq$ 450 MeV) by leveraging waveform-digitizer technology. The $蟽_{tot}$ relative differences between isotopes are presented, revealing additional information about the isovec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.00024v2-abstract-full').style.display = 'inline'; document.getElementById('2006.00024v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.00024v2-abstract-full" style="display: none;"> The neutron total cross sections $蟽_{tot}$ of $^{16,18}$O, $^{58,64}$Ni, $^{103}$Rh, and $^{112,124}$Sn have been measured at the Los Alamos Neutron Science Center (LANSCE) from low to intermediate energies (3 $\leq E_{lab} \leq$ 450 MeV) by leveraging waveform-digitizer technology. The $蟽_{tot}$ relative differences between isotopes are presented, revealing additional information about the isovector components needed for an accurate optical-model description away from stability. Digitizer-enabled $蟽_{tot}$-measurement techniques are discussed and a series of uncertainty-quantified dispersive optical model (DOM) analyses using these new data is presented, validating the use of the DOM for modeling light systems ($^{16,18}$O) and systems with open neutron shells ($^{58,64}$Ni and $^{112,124}$Sn). The valence-nucleon spectroscopic factors extracted for each isotope reaffirm the usefulness of high-energy proton reaction cross sections for characterizing depletion from the mean-field expectation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.00024v2-abstract-full').style.display = 'none'; document.getElementById('2006.00024v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">28 pages, 20 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 102, 034601 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.10371">arXiv:2004.10371</a> <span> [<a href="https://arxiv.org/pdf/2004.10371">pdf</a>, <a href="https://arxiv.org/format/2004.10371">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.astropartphys.2021.102583">10.1016/j.astropartphys.2021.102583 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Performance of the ISS-CREAM calorimeter in a calibration beam test </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Zhang%2C+H+G">H. G. Zhang</a>, <a href="/search/?searchtype=author&query=Angelaszek%2C+D">D. Angelaszek</a>, <a href="/search/?searchtype=author&query=Copley%2C+M">M. Copley</a>, <a href="/search/?searchtype=author&query=Han%2C+J+H">J. H. Han</a>, <a href="/search/?searchtype=author&query=Huh%2C+H+G">H. G. Huh</a>, <a href="/search/?searchtype=author&query=Hwang%2C+Y+S">Y. S. Hwang</a>, <a href="/search/?searchtype=author&query=Hyun%2C+H+J">H. J. Hyun</a>, <a href="/search/?searchtype=author&query=Jeon%2C+J+A">J. A. Jeon</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+C">K. C. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+M+H">M. H. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+H+J">H. J. Kim</a>, <a href="/search/?searchtype=author&query=Kwashnak%2C+K">K. Kwashnak</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+J">J. Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+M+H">M. H. Lee</a>, <a href="/search/?searchtype=author&query=Lundquist%2C+J">J. Lundquist</a>, <a href="/search/?searchtype=author&query=Lutz%2C+L">L. Lutz</a>, <a href="/search/?searchtype=author&query=Malinin%2C+A">A. Malinin</a>, <a href="/search/?searchtype=author&query=Park%2C+H">H. Park</a>, <a href="/search/?searchtype=author&query=Park%2C+J+M">J. M. Park</a>, <a href="/search/?searchtype=author&query=Picot-Clemente%2C+N">N. Picot-Clemente</a>, <a href="/search/?searchtype=author&query=Seo%2C+E+S">E. S. Seo</a>, <a href="/search/?searchtype=author&query=Smith%2C+J">J. Smith</a>, <a href="/search/?searchtype=author&query=Wu%2C+J">J. Wu</a>, <a href="/search/?searchtype=author&query=Yin%2C+Z+Y">Z. Y. Yin</a> , et al. (1 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.10371v5-abstract-short" style="display: inline;"> The Cosmic Ray Energetics And Mass experiment for the International Space Station (ISS-CREAM) was installed on the ISS to measure high-energy cosmic-ray elemental spectra for the charge range $\rm Z=1$ to 26. The ISS-CREAM instrument includes a tungsten scintillating-fiber calorimeter preceded by a carbon target for energy measurements. The carbon target induces hadronic interactions, and showers… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.10371v5-abstract-full').style.display = 'inline'; document.getElementById('2004.10371v5-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.10371v5-abstract-full" style="display: none;"> The Cosmic Ray Energetics And Mass experiment for the International Space Station (ISS-CREAM) was installed on the ISS to measure high-energy cosmic-ray elemental spectra for the charge range $\rm Z=1$ to 26. The ISS-CREAM instrument includes a tungsten scintillating-fiber calorimeter preceded by a carbon target for energy measurements. The carbon target induces hadronic interactions, and showers of secondary particles develop in the calorimeter. The energy deposition in the calorimeter is proportional to the particle energy. As a predecessor to ISS-CREAM, the balloon-borne CREAM instrument was successfully flown seven times over Antarctica for a cumulative exposure of 191 days. The CREAM calorimeter demonstrated its capability to measure energies of cosmic-ray particles, and the ISS-CREAM calorimeter is expected to have a similar performance. Before the launch, an engineering-unit calorimeter was shipped to CERN for calibration and performance tests. This beam test included position, energy, and angle scans of electron and pion beams together with a high-voltage scan for calibration and characterization. Additionally, an attenuation effect in the scintillating fibers was studied. In this paper, beam test results, including corrections for the attenuation effect, are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.10371v5-abstract-full').style.display = 'none'; document.getElementById('2004.10371v5-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">23 pages, 18 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1911.12276">arXiv:1911.12276</a> <span> [<a href="https://arxiv.org/pdf/1911.12276">pdf</a>, <a href="https://arxiv.org/format/1911.12276">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Physics and Society">physics.soc-ph</span> </div> </div> <p class="title is-5 mathjax"> Multiple Monoenergetic Gamma Radiography (MMGR) with a compact superconducting cyclotron </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hin Y. Lee</a>, <a href="/search/?searchtype=author&query=Henderson%2C+B+S">Brian S. Henderson</a>, <a href="/search/?searchtype=author&query=Nelson%2C+R+G">Roberts G. Nelson</a>, <a href="/search/?searchtype=author&query=Danagoulian%2C+A">Areg Danagoulian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1911.12276v2-abstract-short" style="display: inline;"> Smuggling of special nuclear materials (SNM) and nuclear devices through borders and ports of entry constitutes a major risk to global security. Technologies are needed to reliably screen the flow of commerce for the presence of high-$Z$ materials such as uranium and plutonium. Here we present an experimental proof-of-concept of a technique which uses inelastic ($p,p'$) nuclear reactions to genera… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.12276v2-abstract-full').style.display = 'inline'; document.getElementById('1911.12276v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.12276v2-abstract-full" style="display: none;"> Smuggling of special nuclear materials (SNM) and nuclear devices through borders and ports of entry constitutes a major risk to global security. Technologies are needed to reliably screen the flow of commerce for the presence of high-$Z$ materials such as uranium and plutonium. Here we present an experimental proof-of-concept of a technique which uses inelastic ($p,p'$) nuclear reactions to generate monoenergetic photons, which provide means to measure the areal density and the effective-$Z$ ($Z_{\text{eff}}$) of an object with an accuracy which surpasses that achieved by current methods. We use an ION-12$^{ \text{SC}}$ superconducting 12~MeV proton cyclotron to produce 4.4, 6.1, 6.9, and 7.1~MeV photons from a variety of nuclear reactions. Using these photons in a transmission mode we show that we are able to accurately reconstruct the areal densities and $Z_{\text{eff}}$ of a test object. This methodology could enable mobile applications to screen commercial cargoes with high material specificity, providing a means of distinguishing common cargo materials from high-Z materials that include uranium and plutonium. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.12276v2-abstract-full').style.display = 'none'; document.getElementById('1911.12276v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1910.13387">arXiv:1910.13387</a> <span> [<a href="https://arxiv.org/pdf/1910.13387">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/s12274-019-2601-7">10.1007/s12274-019-2601-7 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Direct Optical-Structure Correlation in Atomically Thin Dichalcogenides and Heterostructures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Singh%2C+A">Akshay Singh</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hae Yeon Lee</a>, <a href="/search/?searchtype=author&query=Gradecak%2C+S">Silvija Gradecak</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1910.13387v1-abstract-short" style="display: inline;"> Atomically thin transition metal dichalcogenides (TMDs) have distinct opto-electronic properties including enhanced luminescence and high on-off current ratios, which can be further modulated by making more complex TMD heterostructures. However, resolution limits of conventional optical methods do not allow for direct optical-structural correlation measurements in these materials, particularly of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.13387v1-abstract-full').style.display = 'inline'; document.getElementById('1910.13387v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1910.13387v1-abstract-full" style="display: none;"> Atomically thin transition metal dichalcogenides (TMDs) have distinct opto-electronic properties including enhanced luminescence and high on-off current ratios, which can be further modulated by making more complex TMD heterostructures. However, resolution limits of conventional optical methods do not allow for direct optical-structural correlation measurements in these materials, particularly of buried interfaces in TMD heterostructures. Here we use, for the first time, electron beam induced cathodoluminescence in a scanning transmission electron microscope (CL-STEM) to measure optical properties of monolayer TMDs (WS2, MoS2 and WSSe alloy) encapsulated between layers of hBN. We observe dark areas resulting from localized (~ 100 nm) imperfect interfaces and monolayer folding, which shows that the intimate contact between layers in this application-relevant heterostructure is required for proper inter layer coupling. We also realize a suitable imaging method that minimizes electron-beam induced changes and provides measurement of intrinsic properties. To overcome the limitation of small electron interaction volume in TMD monolayer (and hence low photon yield), we find that encapsulation of TMD monolayers with hBN and subsequent annealing is important. CL-STEM offers to be a powerful method to directly measure structure-optical correspondence in lateral or vertical heterostructures and alloys. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.13387v1-abstract-full').style.display = 'none'; document.getElementById('1910.13387v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">supplementary also included within file</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nano research 2019 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1909.04249">arXiv:1909.04249</a> <span> [<a href="https://arxiv.org/pdf/1909.04249">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Piezoelectric generator driven by enhanced light pressure </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Ha Young Lee</a>, <a href="/search/?searchtype=author&query=Lim%2C+K">Kyung-Won Lim</a>, <a href="/search/?searchtype=author&query=Kwak%2C+M+S">Min Sub Kwak</a>, <a href="/search/?searchtype=author&query=Hwang%2C+G">Geon-Tae Hwang</a>, <a href="/search/?searchtype=author&query=Yi%2C+S+N">Sam Nyung Yi</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1909.04249v1-abstract-short" style="display: inline;"> A light-pressure electric generator (LPEG) is reported that converts amplified radiation pressure into electrical energy. Its underlying principle differs from that of conventional piezoelectric power generation. The generator was fabricated by coating a thin Pb(Zr,Ti)O3 film on a wet-chemical-etched microvoid-shaped structure on the surface of a GaAs wafer and then depositing platinum. The surfac… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.04249v1-abstract-full').style.display = 'inline'; document.getElementById('1909.04249v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1909.04249v1-abstract-full" style="display: none;"> A light-pressure electric generator (LPEG) is reported that converts amplified radiation pressure into electrical energy. Its underlying principle differs from that of conventional piezoelectric power generation. The generator was fabricated by coating a thin Pb(Zr,Ti)O3 film on a wet-chemical-etched microvoid-shaped structure on the surface of a GaAs wafer and then depositing platinum. The surface plasmon phenomenon of the precious metal and the microvoid structure caused the radiation pressure to be amplified sufficiently to stimulate the piezoelectric material. This method provides versatile and cost-effective energy harvesting and represents a potentially useful new way of powering the Internet of Things devices. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.04249v1-abstract-full').style.display = 'none'; document.getElementById('1909.04249v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 78A55 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1904.03453">arXiv:1904.03453</a> <span> [<a href="https://arxiv.org/pdf/1904.03453">pdf</a>, <a href="https://arxiv.org/ps/1904.03453">ps</a>, <a href="https://arxiv.org/format/1904.03453">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optimization and Control">math.OC</span> </div> </div> <p class="title is-5 mathjax"> Regularized Sample Average Approximation for High-Dimensional Stochastic Optimization Under Low-Rankness </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Liu%2C+H">Hongcheng Liu</a>, <a href="/search/?searchtype=author&query=Hernandez%2C+C">Charles Hernandez</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hung Yi Lee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1904.03453v3-abstract-short" style="display: inline;"> This paper concerns a high-dimensional stochastic programming problem of minimizing a function of expected cost with a matrix argument. To this problem, one of the most widely applied solution paradigms is the sample average approximation (SAA), which uses the average cost over sampled scenarios as a surrogate to approximate the expected cost. Traditional SAA theories require the sample size to gr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.03453v3-abstract-full').style.display = 'inline'; document.getElementById('1904.03453v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.03453v3-abstract-full" style="display: none;"> This paper concerns a high-dimensional stochastic programming problem of minimizing a function of expected cost with a matrix argument. To this problem, one of the most widely applied solution paradigms is the sample average approximation (SAA), which uses the average cost over sampled scenarios as a surrogate to approximate the expected cost. Traditional SAA theories require the sample size to grow rapidly when the problem dimensionality increases. Indeed, for a problem of optimizing over a $p$-by-$p$ matrix, the sample complexity of the SAA is given by $\tilde O(1)\cdot \frac{p^2}{蔚^2}\cdot{polylog}(\frac{1}蔚)$ to achieve an $蔚$-suboptimality gap, for some poly-logarithmic function ${polylog}(\,\cdot\,)$ and some quantity $\tilde O(1)$ independent of dimensionality $p$ and sample size $n$. In contrast, this paper considers a regularized SAA (RSAA) with a low-rankness-inducing penalty. We demonstrate that the sample complexity of RSAA is $\tilde O(1)\cdot \frac{p}{蔚^3}\cdot {polylog}(p,\,\frac{1}蔚)$, which is almost linear in $p$ and thus indicates a substantially lower dependence on dimensionality. Therefore, RSAA can be more advantageous than SAA especially for larger scale and higher dimensional problems. Due to the close correspondence between stochastic programming and statistical learning, our results also indicate that high-dimensional low-rank matrix recovery is possible generally beyond a linear model, even if the common assumption of restricted strong convexity is completely absent. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.03453v3-abstract-full').style.display = 'none'; document.getElementById('1904.03453v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 62J02; 65K05 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1903.00616">arXiv:1903.00616</a> <span> [<a href="https://arxiv.org/pdf/1903.00616">pdf</a>, <a href="https://arxiv.org/format/1903.00616">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Statistics Theory">math.ST</span> </div> </div> <p class="title is-5 mathjax"> High-Dimensional Learning under ApproximateSparsity with Applications to Nonsmooth Estimation and Regularized Neural Networks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Liu%2C+H">Hongcheng Liu</a>, <a href="/search/?searchtype=author&query=Ye%2C+Y">Yinyu Ye</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hung Yi Lee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1903.00616v2-abstract-short" style="display: inline;"> High-dimensional statistical learning (HDSL) has wide applications in data analysis, operations research, and decision-making. Despite the availability of multiple theoretical frameworks, most existing HDSL schemes stipulate the following two conditions: (a) the sparsity, and (b) the restricted strong convexity (RSC). This paper generalizes both conditions via the use of the folded concave penalty… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.00616v2-abstract-full').style.display = 'inline'; document.getElementById('1903.00616v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1903.00616v2-abstract-full" style="display: none;"> High-dimensional statistical learning (HDSL) has wide applications in data analysis, operations research, and decision-making. Despite the availability of multiple theoretical frameworks, most existing HDSL schemes stipulate the following two conditions: (a) the sparsity, and (b) the restricted strong convexity (RSC). This paper generalizes both conditions via the use of the folded concave penalty (FCP). More specifically, we consider an M-estimation problem where (i) the (conventional) sparsity is relaxed into the approximate sparsity and (ii) the RSC is completely absent. We show that the FCP-based regularization leads to poly-logarithmic sample complexity; the training data size is only required to be poly-logarithmic in the problem dimensionality. This finding can facilitate the analysis of two important classes of models that are currently less understood: the high-dimensional nonsmooth learning and the (deep) neural networks (NN). For both problems, we show that the poly-logarithmic sample complexity can be maintained. In particular, our results indicate that the generalizability of NNs under over-parameterization can be theoretically ensured with the aid of regularization. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1903.00616v2-abstract-full').style.display = 'none'; document.getElementById('1903.00616v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.04225">arXiv:1802.04225</a> <span> [<a href="https://arxiv.org/pdf/1802.04225">pdf</a>, <a href="https://arxiv.org/format/1802.04225">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Physics and Society">physics.soc-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/1.5025805">10.1063/1.5025805 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Experimental Demonstration of Multiple Monoenergetic Gamma Radiography for Effective Atomic Number Identification in Cargo Inspection </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Henderson%2C+B+S">Brian S. Henderson</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hin Y. Lee</a>, <a href="/search/?searchtype=author&query=MacDonald%2C+T+D">Thomas D. MacDonald</a>, <a href="/search/?searchtype=author&query=Nelson%2C+R+G">Roberts G. Nelson</a>, <a href="/search/?searchtype=author&query=Danagoulian%2C+A">Areg Danagoulian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1802.04225v2-abstract-short" style="display: inline;"> The smuggling of special nuclear materials (SNM) through international borders could enable nuclear terrorism and constitutes a significant threat to global security. This paper presents the experimental demonstration of a novel radiographic technique for quantitatively reconstructing the density and type of material present in commercial cargo containers, as a means of detecting such threats. Unl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.04225v2-abstract-full').style.display = 'inline'; document.getElementById('1802.04225v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.04225v2-abstract-full" style="display: none;"> The smuggling of special nuclear materials (SNM) through international borders could enable nuclear terrorism and constitutes a significant threat to global security. This paper presents the experimental demonstration of a novel radiographic technique for quantitatively reconstructing the density and type of material present in commercial cargo containers, as a means of detecting such threats. Unlike traditional techniques which use sources of bremsstrahlung photons with a continuous distribution of energies, multiple monoenergetic gamma radiography (MMGR) utilizes monoenergetic photons from nuclear reactions, specifically the 4.4 and 15.1 MeV photons from the $^{11}$B(d,n$纬$)$^{12}$C reaction. By exploiting the $Z$-dependence of the photon interaction cross sections at these two specific energies it is possible to simultaneously determine the areal density and the effective atomic number as a function of location for a 2D projection of a scanned object. The additional information gleaned from using and detecting photons of specific energies for radiography substantially increases the resolving power between different materials. This paper presents results from the imaging of mock cargo materials ranging from $Z\approx5$--$92$, demonstrating accurate reconstruction of the effective atomic number and areal density of the materials over the full range. In particular, the system is capable of distinguishing pure materials with $Z\gtrsim70$, such as lead and uranium --- a critical requirement of a system designed to detect SNM. This methodology could be used to screen commercial cargoes with high material specificity, to distinguish most benign materials from SNM, such as uranium and plutonium. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.04225v2-abstract-full').style.display = 'none'; document.getElementById('1802.04225v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 March, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 12 figures, version 2 includes language/typographical edits and changes (chiefly additions) in response to reviewers</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Applied Physics 123, 164901 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1704.02512">arXiv:1704.02512</a> <span> [<a href="https://arxiv.org/pdf/1704.02512">pdf</a>, <a href="https://arxiv.org/ps/1704.02512">ps</a>, <a href="https://arxiv.org/format/1704.02512">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Astrophysical Phenomena">astro-ph.HE</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.3847/1538-4357/aa68e4">10.3847/1538-4357/aa68e4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Proton and Helium Spectra from the CREAM-III Flight </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Yoon%2C+Y+S">Y. S. Yoon</a>, <a href="/search/?searchtype=author&query=Anderson%2C+T">T. Anderson</a>, <a href="/search/?searchtype=author&query=Barrau%2C+A">A. Barrau</a>, <a href="/search/?searchtype=author&query=Conklin%2C+N+B">N. B. Conklin</a>, <a href="/search/?searchtype=author&query=Coutu%2C+S">S. Coutu</a>, <a href="/search/?searchtype=author&query=Derome%2C+L">L. Derome</a>, <a href="/search/?searchtype=author&query=Han%2C+J+H">J. H. Han</a>, <a href="/search/?searchtype=author&query=Jeon%2C+J+A">J. A. Jeon</a>, <a href="/search/?searchtype=author&query=Kim%2C+K+C">K. C. Kim</a>, <a href="/search/?searchtype=author&query=Kim%2C+M+H">M. H. Kim</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+J">J. Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+M+H">M. H. Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+S+E">S. E. Lee</a>, <a href="/search/?searchtype=author&query=Link%2C+J+T">J. T. Link</a>, <a href="/search/?searchtype=author&query=Menchaca-Rocha%2C+A">A. Menchaca-Rocha</a>, <a href="/search/?searchtype=author&query=Mitchell%2C+J+W">J. W. Mitchell</a>, <a href="/search/?searchtype=author&query=Mognet%2C+S+I">S. I. Mognet</a>, <a href="/search/?searchtype=author&query=Nutter%2C+S">S. Nutter</a>, <a href="/search/?searchtype=author&query=Park%2C+I+H">I. H. Park</a>, <a href="/search/?searchtype=author&query=Picot-Clemente%2C+N">N. Picot-Clemente</a>, <a href="/search/?searchtype=author&query=Putze%2C+A">A. Putze</a>, <a href="/search/?searchtype=author&query=Seo%2C+E+S">E. S. Seo</a>, <a href="/search/?searchtype=author&query=Smith%2C+J">J. Smith</a>, <a href="/search/?searchtype=author&query=Wu%2C+J">J. Wu</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1704.02512v1-abstract-short" style="display: inline;"> Primary cosmic-ray elemental spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment since 2004. The third CREAM payload (CREAM-III) flew for 29 days during the 2007-2008 Antarctic season. Energies of incident particles above 1 TeV are measured with a calorimeter. Individual elements are clearly separated with a charge resolution of ~0.12 e (in charge un… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.02512v1-abstract-full').style.display = 'inline'; document.getElementById('1704.02512v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1704.02512v1-abstract-full" style="display: none;"> Primary cosmic-ray elemental spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment since 2004. The third CREAM payload (CREAM-III) flew for 29 days during the 2007-2008 Antarctic season. Energies of incident particles above 1 TeV are measured with a calorimeter. Individual elements are clearly separated with a charge resolution of ~0.12 e (in charge units) and ~0.14 e for protons and helium nuclei, respectively, using two layers of silicon charge detectors. The measured proton and helium energy spectra at the top of the atmosphere are harder than other existing measurements at a few tens of GeV. The relative abundance of protons to helium nuclei is 9.53+-0.03 for the range of 1 TeV/n to 63 TeV/n. The ratio is considerably smaller than other measurements at a few tens of GeV/n. The spectra become softer above ~20 TeV. However, our statistical uncertainties are large at these energies and more data are needed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.02512v1-abstract-full').style.display = 'none'; document.getElementById('1704.02512v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> The Astrophysical Journal, 839:5 (8pp), 2017 April 10 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1605.09690">arXiv:1605.09690</a> <span> [<a href="https://arxiv.org/pdf/1605.09690">pdf</a>, <a href="https://arxiv.org/format/1605.09690">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Total kinetic energy release in the fast neutron-induced fission of $^{235}$U </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Yanez%2C+R">R. Yanez</a>, <a href="/search/?searchtype=author&query=Loveland%2C+W">W. Loveland</a>, <a href="/search/?searchtype=author&query=King%2C+J">J. King</a>, <a href="/search/?searchtype=author&query=Barrett%2C+J+S">J. S. Barrett</a>, <a href="/search/?searchtype=author&query=Fotiades%2C+N">N. Fotiades</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1605.09690v4-abstract-short" style="display: inline;"> We have measured the total kinetic energy (TKE) release for the $^{235}$U(n,f) reaction for $E_{n}$=2-100 MeV using the 2E method with an array of Si PIN diode detectors. The neutron energies were determined by time of flight measurements using the white spectrum neutron beam at the LANSCE facility. To benchmark the TKE measurement, the TKE release for $^{235}$U(n$_{th}$,f) was also measured using… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.09690v4-abstract-full').style.display = 'inline'; document.getElementById('1605.09690v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1605.09690v4-abstract-full" style="display: none;"> We have measured the total kinetic energy (TKE) release for the $^{235}$U(n,f) reaction for $E_{n}$=2-100 MeV using the 2E method with an array of Si PIN diode detectors. The neutron energies were determined by time of flight measurements using the white spectrum neutron beam at the LANSCE facility. To benchmark the TKE measurement, the TKE release for $^{235}$U(n$_{th}$,f) was also measured using a thermal neutron beam from the Oregon State University TRIGA reactor, giving pre-neutron emission $E^*_{TKE}=170.7\pm0.4$ MeV in good agreement with known values. Our measurements are thus absolute measurements. The TKE in $^{235}$U(n,f) decreases non-linearly from 169 MeV to 161 MeV for $E_{n}$=2-100 MeV. The multi-modal fission analysis of mass distributions and TKE indicates the origin of the TKE decrease with increasing neutron energy is a consequence of the fade out of asymmetric fission, which is associated with a higher TKE compared to symmetric fission. The average TKE associated with the superlong, standard I and standard II modes for a given mass is independent of neutron energy. The widths of the TKE distributions are constant from $E_{n}$=20-100 MeV and hence show no dependence with excitation energy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.09690v4-abstract-full').style.display = 'none'; document.getElementById('1605.09690v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 August, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">arXiv admin note: substantial text overlap with arXiv:1512.06731</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> OSU/Yanez-TKE-U235 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1512.06731">arXiv:1512.06731</a> <span>  </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> </div> <p class="title is-5 mathjax"> Total kinetic energy release in the fast neutron-induced fission of $^{235}$U </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Yanez%2C+R">R. Yanez</a>, <a href="/search/?searchtype=author&query=Loveland%2C+W">W. Loveland</a>, <a href="/search/?searchtype=author&query=King%2C+J">J. King</a>, <a href="/search/?searchtype=author&query=Barrett%2C+J+S">J. S. Barrett</a>, <a href="/search/?searchtype=author&query=Fotiades%2C+N">N. Fotiades</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1512.06731v5-abstract-short" style="display: inline;"> We have measured the total kinetic energy (TKE) release for the $^{235}$U(n,f) reaction for $E_{n}$=2-100 MeV using the 2E method with an array of Si PIN diode detectors. The neutron energies were determined by time of flight measurements using the white spectrum neutron beam at the LANSCE facility. (To calibrate the apparatus, the TKE release for $^{235}$U(n$_{th}$,f) was also measured using a th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.06731v5-abstract-full').style.display = 'inline'; document.getElementById('1512.06731v5-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1512.06731v5-abstract-full" style="display: none;"> We have measured the total kinetic energy (TKE) release for the $^{235}$U(n,f) reaction for $E_{n}$=2-100 MeV using the 2E method with an array of Si PIN diode detectors. The neutron energies were determined by time of flight measurements using the white spectrum neutron beam at the LANSCE facility. (To calibrate the apparatus, the TKE release for $^{235}$U(n$_{th}$,f) was also measured using a thermal neutron beam from the OSU TRIGA reactor). The TKE decreases non-linearly from 169.0 MeV to 161.4 MeV for $E_{n}$=2-90 MeV. The standard deviation of the TKE distribution is constant from $E_{n}$=20-90 MeV. Comparison of the data with the multi-modal fission model of Brosa indicates the TKE decrease is a consequence of the growth of symmetric fission and the corresponding decrease of asymmetric fission with increasing neutron energy. The average TKE associated with the Brosa superlong, standard I and standard II modes for a given mass is independent of neutron energy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.06731v5-abstract-full').style.display = 'none'; document.getElementById('1512.06731v5-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Supplemental Data error column 4, TKE variance</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1504.00642">arXiv:1504.00642</a> <span> [<a href="https://arxiv.org/pdf/1504.00642">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Thermoelectric Signal Enhancement by Reconciling the Spin Seebeck and Anomalous Nernst Effects in Ferromagnet/Non-magnet Multilayers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Lee%2C+K">Kyeong-Dong Lee</a>, <a href="/search/?searchtype=author&query=Kim%2C+D">Dong-Jun Kim</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hae Yeon Lee</a>, <a href="/search/?searchtype=author&query=Kim%2C+S">Seung-Hyun Kim</a>, <a href="/search/?searchtype=author&query=Lee%2C+J">Jong-Hyun Lee</a>, <a href="/search/?searchtype=author&query=Lee%2C+K">Kyung-Min Lee</a>, <a href="/search/?searchtype=author&query=Jeong%2C+J">Jong-Ryul Jeong</a>, <a href="/search/?searchtype=author&query=Lee%2C+K">Ki-Suk Lee</a>, <a href="/search/?searchtype=author&query=Song%2C+H">Hyon-Seok Song</a>, <a href="/search/?searchtype=author&query=Sohn%2C+J">Jeong-Woo Sohn</a>, <a href="/search/?searchtype=author&query=Shin%2C+S">Sung-Chul Shin</a>, <a href="/search/?searchtype=author&query=Park%2C+B">Byong-Guk Park</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1504.00642v1-abstract-short" style="display: inline;"> The utilization of ferromagnetic (FM) materials in thermoelectric devices allows one to have a simpler structure and/or independent control of electric and thermal conductivities, which may further remove obstacles for this technology to be realized. The thermoelectricity in FM/non-magnet (NM) heterostructures using an optical heating source is studied as a function of NM materials and a number of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.00642v1-abstract-full').style.display = 'inline'; document.getElementById('1504.00642v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1504.00642v1-abstract-full" style="display: none;"> The utilization of ferromagnetic (FM) materials in thermoelectric devices allows one to have a simpler structure and/or independent control of electric and thermal conductivities, which may further remove obstacles for this technology to be realized. The thermoelectricity in FM/non-magnet (NM) heterostructures using an optical heating source is studied as a function of NM materials and a number of multilayers. It is observed that the overall thermoelectric signal in those structures which is contributed by spin Seebeck effect and anomalous Nernst effect (ANE) is enhanced by a proper selection of NM materials with a spin Hall angle that matches to the sign of the ANE. Moreover, by an increase of the number of multilayer, the thermoelectric voltage is enlarged further and the device resistance is reduced, simultaneously. The experimental observation of the improvement of thermoelectric properties may pave the way for the realization of magnetic-(or spin-) based thermoelectric devices. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.00642v1-abstract-full').style.display = 'none'; document.getElementById('1504.00642v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2015. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1007.4998">arXiv:1007.4998</a> <span> [<a href="https://arxiv.org/pdf/1007.4998">pdf</a>, <a href="https://arxiv.org/ps/1007.4998">ps</a>, <a href="https://arxiv.org/format/1007.4998">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2010.02.262">10.1016/j.nima.2010.02.262 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The neutron long counter NERO for studies of beta-delayed neutron emission in the r-process </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Pereira%2C+J">J. Pereira</a>, <a href="/search/?searchtype=author&query=Hosmer%2C+P">P. Hosmer</a>, <a href="/search/?searchtype=author&query=Lorusso%2C+G">G. Lorusso</a>, <a href="/search/?searchtype=author&query=Santi%2C+P">P. Santi</a>, <a href="/search/?searchtype=author&query=Couture%2C+A">A. Couture</a>, <a href="/search/?searchtype=author&query=Daly%2C+J">J. Daly</a>, <a href="/search/?searchtype=author&query=Del+Santo%2C+M">M. Del Santo</a>, <a href="/search/?searchtype=author&query=Elliot%2C+T">T. Elliot</a>, <a href="/search/?searchtype=author&query=Goerres%2C+J">J. Goerres</a>, <a href="/search/?searchtype=author&query=Herlitzius%2C+C">C. Herlitzius</a>, <a href="/search/?searchtype=author&query=Kratz%2C+K+-">K. -L. Kratz</a>, <a href="/search/?searchtype=author&query=Lamm%2C+L+O">L. O. Lamm</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a>, <a href="/search/?searchtype=author&query=Montes%2C+F">F. Montes</a>, <a href="/search/?searchtype=author&query=Ouellette%2C+M">M. Ouellette</a>, <a href="/search/?searchtype=author&query=Pellegrini%2C+E">E. Pellegrini</a>, <a href="/search/?searchtype=author&query=Reeder%2C+P">P. Reeder</a>, <a href="/search/?searchtype=author&query=Schatz%2C+H">H. Schatz</a>, <a href="/search/?searchtype=author&query=Schertz%2C+F">F. Schertz</a>, <a href="/search/?searchtype=author&query=Schnorrenberger%2C+L">L. Schnorrenberger</a>, <a href="/search/?searchtype=author&query=Smith%2C+K">K. Smith</a>, <a href="/search/?searchtype=author&query=Stech%2C+E">E. Stech</a>, <a href="/search/?searchtype=author&query=Strandberg%2C+E">E. Strandberg</a>, <a href="/search/?searchtype=author&query=Ugalde%2C+C">C. Ugalde</a>, <a href="/search/?searchtype=author&query=Wiescher%2C+M">M. Wiescher</a> , et al. (1 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1007.4998v1-abstract-short" style="display: inline;"> The neutron long counter NERO was built at the National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, for measuring beta-delayed neutron-emission probabilities. The detector was designed to work in conjunction with a beta-decay implantation station, so that beta decays and beta-delayed neutrons emitted from implanted nuclei can be measured simultaneously. The high efficie… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1007.4998v1-abstract-full').style.display = 'inline'; document.getElementById('1007.4998v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1007.4998v1-abstract-full" style="display: none;"> The neutron long counter NERO was built at the National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, for measuring beta-delayed neutron-emission probabilities. The detector was designed to work in conjunction with a beta-decay implantation station, so that beta decays and beta-delayed neutrons emitted from implanted nuclei can be measured simultaneously. The high efficiency of about 40%, for the range of energies of interest, along with the small background, are crucial for measuring beta-delayed neutron emission branchings for neutron-rich r-process nuclei produced as low intensity fragmentation beams in in-flight separator facilities. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1007.4998v1-abstract-full').style.display = 'none'; document.getElementById('1007.4998v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 July, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2010. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl.Instrum.Meth.A618:275-283,2010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0908.4286">arXiv:0908.4286</a> <span> [<a href="https://arxiv.org/pdf/0908.4286">pdf</a>, <a href="https://arxiv.org/ps/0908.4286">ps</a>, <a href="https://arxiv.org/format/0908.4286">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.80.035804">10.1103/PhysRevC.80.035804 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of proton induced reaction cross sections on 120Te for the astrophysical p-process </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=G%C3%BCray%2C+R+T">R. T. G眉ray</a>, <a href="/search/?searchtype=author&query=%C3%96zkan%2C+N">N. 脰zkan</a>, <a href="/search/?searchtype=author&query=Yal%C3%A7%C4%B1n%2C+C">C. Yal莽谋n</a>, <a href="/search/?searchtype=author&query=Palumbo%2C+A">A. Palumbo</a>, <a href="/search/?searchtype=author&query=deBoer%2C+R">R. deBoer</a>, <a href="/search/?searchtype=author&query=G%C3%B6rres%2C+J">J. G枚rres</a>, <a href="/search/?searchtype=author&query=Leblanc%2C+P+J">P. J. Leblanc</a>, <a href="/search/?searchtype=author&query=O%27Brien%2C+S">S. O'Brien</a>, <a href="/search/?searchtype=author&query=Strandberg%2C+E">E. Strandberg</a>, <a href="/search/?searchtype=author&query=Tan%2C+W+P">W. P. Tan</a>, <a href="/search/?searchtype=author&query=Wiescher%2C+M">M. Wiescher</a>, <a href="/search/?searchtype=author&query=F%C3%BCl%C3%B6p%2C+Z">Zs. F眉l枚p</a>, <a href="/search/?searchtype=author&query=Somorjai%2C+E">E. Somorjai</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">H. Y. Lee</a>, <a href="/search/?searchtype=author&query=Greene%2C+J+P">J. P. Greene</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0908.4286v1-abstract-short" style="display: inline;"> The total cross sections for the 120Te(p,gamma)121I and 120Te(p,n)120I reactions have been measured by the activation method in the effective center-of-mass energies between 2.47 MeV and 7.93 MeV. The targets were prepared by evaporation of 99.4 % isotopically enriched 120Te on Aluminum and Carbon backing foils, and bombarded with proton beams provided by the FN tandem accelerator at the Univers… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0908.4286v1-abstract-full').style.display = 'inline'; document.getElementById('0908.4286v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0908.4286v1-abstract-full" style="display: none;"> The total cross sections for the 120Te(p,gamma)121I and 120Te(p,n)120I reactions have been measured by the activation method in the effective center-of-mass energies between 2.47 MeV and 7.93 MeV. The targets were prepared by evaporation of 99.4 % isotopically enriched 120Te on Aluminum and Carbon backing foils, and bombarded with proton beams provided by the FN tandem accelerator at the University of Notre Dame. The cross sections and $S$ factors were deduced from the observed gamma ray activity, which was detected off-line by two Clover HPGe detectors mounted in close geometry. The results are presented and compared with the predictions of statistical model calculations using the codes NON-SMOKER and TALYS. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0908.4286v1-abstract-full').style.display = 'none'; document.getElementById('0908.4286v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 August, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2009. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 5 figures, 5 tables, regular article</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0906.1246">arXiv:0906.1246</a> <span> [<a href="https://arxiv.org/pdf/0906.1246">pdf</a>, <a href="https://arxiv.org/ps/0906.1246">ps</a>, <a href="https://arxiv.org/format/0906.1246">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Differential Geometry">math.DG</span> </div> </div> <p class="title is-5 mathjax"> Ruled minimal surfaces in the three dimensional Heisenberg group </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Kim%2C+Y+W">Young Wook Kim</a>, <a href="/search/?searchtype=author&query=Koh%2C+S">Sung-Eun Koh</a>, <a href="/search/?searchtype=author&query=Lee%2C+H+Y">Hyung Yong Lee</a>, <a href="/search/?searchtype=author&query=Shin%2C+H">Heayong Shin</a>, <a href="/search/?searchtype=author&query=Yang%2C+S">Seong-Deog Yang</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0906.1246v1-abstract-short" style="display: inline;"> It is shown that parts of planes, helicoids and hyperbolic paraboloids are the only minimal surfaces ruled by geodesics in the three dimensional Riemannian Heisenberg group. It is also shown that they are the only surfaces in the three dimensional Heisenberg group whose mean curvature is zero with respect to both of the standard Riemannian metric and the standard Lorentzian metric. </span> <span class="abstract-full has-text-grey-dark mathjax" id="0906.1246v1-abstract-full" style="display: none;"> It is shown that parts of planes, helicoids and hyperbolic paraboloids are the only minimal surfaces ruled by geodesics in the three dimensional Riemannian Heisenberg group. It is also shown that they are the only surfaces in the three dimensional Heisenberg group whose mean curvature is zero with respect to both of the standard Riemannian metric and the standard Lorentzian metric. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0906.1246v1-abstract-full').style.display = 'none'; document.getElementById('0906.1246v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 June, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2009. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 53A35 </p> </li> </ol> <nav class="pagination is-small 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