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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <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/2406.15422">arXiv:2406.15422</a> <span> [<a href="https://arxiv.org/pdf/2406.15422">pdf</a>, <a href="https://arxiv.org/format/2406.15422">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Fluorescence Imaging of Individual Ions and Molecules in Pressurized Noble Gases for Barium Tagging in $^{136}$Xe </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/nucl-ex?searchtype=author&query=Dey%2C+E">E. Dey</a>, <a href="/search/nucl-ex?searchtype=author&query=Foss%2C+F+W">F. W. Foss</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=Madigan%2C+R">R. Madigan</a>, <a href="/search/nucl-ex?searchtype=author&query=McDonald%2C+A">A. McDonald</a>, <a href="/search/nucl-ex?searchtype=author&query=Miller%2C+R+L">R. L. Miller</a>, <a href="/search/nucl-ex?searchtype=author&query=Navarro%2C+K+E">K. E. Navarro</a>, <a href="/search/nucl-ex?searchtype=author&query=Norman%2C+L+R">L. R. Norman</a>, <a href="/search/nucl-ex?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/nucl-ex?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/nucl-ex?searchtype=author&query=Auria-Luna%2C+F">F. Auria-Luna</a>, <a href="/search/nucl-ex?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Barcelon%2C+J+E">J. E. Barcelon</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/nucl-ex?searchtype=author&query=del+Barrio-Torregrosa%2C+M">M. del Barrio-Torregrosa</a> , et al. (90 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="2406.15422v1-abstract-short" style="display: inline;"> The imaging of individual Ba$^{2+}$ ions in high pressure xenon gas is one possible way to attain background-free sensitivity to neutrinoless double beta decay and hence establish the Majorana nature of the neutrino. In this paper we demonstrate selective single Ba$^{2+}$ ion imaging inside a high-pressure xenon gas environment. Ba$^{2+}$ ions chelated with molecular chemosensors are resolved at t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15422v1-abstract-full').style.display = 'inline'; document.getElementById('2406.15422v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.15422v1-abstract-full" style="display: none;"> The imaging of individual Ba$^{2+}$ ions in high pressure xenon gas is one possible way to attain background-free sensitivity to neutrinoless double beta decay and hence establish the Majorana nature of the neutrino. In this paper we demonstrate selective single Ba$^{2+}$ ion imaging inside a high-pressure xenon gas environment. Ba$^{2+}$ ions chelated with molecular chemosensors are resolved at the gas-solid interface using a diffraction-limited imaging system with scan area of 1$\times$1~cm$^2$ located inside 10~bar of xenon gas. This new form of microscopy represents an important enabling step in the development of barium tagging for neutrinoless double beta decay searches in $^{136}$Xe, as well as a new tool for studying the photophysics of fluorescent molecules and chemosensors at the solid-gas interface. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15422v1-abstract-full').style.display = 'none'; document.getElementById('2406.15422v1-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 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.07952">arXiv:2405.07952</a> <span> [<a href="https://arxiv.org/pdf/2405.07952">pdf</a>, <a href="https://arxiv.org/format/2405.07952">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="High Energy Physics - Experiment">hep-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"> White paper on ($伪$, n) neutron yield calculations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Cano-Ott%2C+D">D. Cano-Ott</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Dimitriou%2C+P">P. Dimitriou</a>, <a href="/search/nucl-ex?searchtype=author&query=Gromov%2C+M">M. Gromov</a>, <a href="/search/nucl-ex?searchtype=author&query=Hara%C5%84czyk%2C+M">M. Hara艅czyk</a>, <a href="/search/nucl-ex?searchtype=author&query=Kish%2C+A">A. Kish</a>, <a href="/search/nucl-ex?searchtype=author&query=Kluck%2C+H">H. Kluck</a>, <a href="/search/nucl-ex?searchtype=author&query=Kudryavtsev%2C+V+A">V. A. Kudryavtsev</a>, <a href="/search/nucl-ex?searchtype=author&query=Lazanu%2C+I">I. Lazanu</a>, <a href="/search/nucl-ex?searchtype=author&query=Lozza%2C+V">V. Lozza</a>, <a href="/search/nucl-ex?searchtype=author&query=Luz%C3%B3n%2C+G">G. Luz贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Mendoza%2C+E">E. Mendoza</a>, <a href="/search/nucl-ex?searchtype=author&query=Parvu%2C+M">M. Parvu</a>, <a href="/search/nucl-ex?searchtype=author&query=Pesudo%2C+V">V. Pesudo</a>, <a href="/search/nucl-ex?searchtype=author&query=Pocar%2C+A">A. Pocar</a>, <a href="/search/nucl-ex?searchtype=author&query=Santorelli%2C+R">R. Santorelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Selvi%2C+M">M. Selvi</a>, <a href="/search/nucl-ex?searchtype=author&query=Westerdale%2C+S">S. Westerdale</a>, <a href="/search/nucl-ex?searchtype=author&query=Zuzel%2C+G">G. Zuzel</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="2405.07952v3-abstract-short" style="display: inline;"> Understanding the radiogenic neutron production rate through the ($伪$, n) reaction is crucial in many areas of physics, including dark matter searches, neutrino studies, and nuclear astrophysics. In addition to its relevance for fundamental research, the ($伪$, n) reaction also plays a significant role in nuclear energy technologies and in applications such as medical physics. This white paper revi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.07952v3-abstract-full').style.display = 'inline'; document.getElementById('2405.07952v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.07952v3-abstract-full" style="display: none;"> Understanding the radiogenic neutron production rate through the ($伪$, n) reaction is crucial in many areas of physics, including dark matter searches, neutrino studies, and nuclear astrophysics. In addition to its relevance for fundamental research, the ($伪$, n) reaction also plays a significant role in nuclear energy technologies and in applications such as medical physics. This white paper reviews the current state of ($伪$, n) yield calculations, neutron spectra, and describes the computational tools used for their estimation and the available cross-sections. The uncertainties affecting the estimation of ($伪$, n) yields are addressed, and a program to enhance the accuracy of these estimates is proposed. Furthermore, the need for new measurements of ($伪$, n) cross-sections for a variety of relevant materials is emphasized. Such improvements in neutron flux predictions are crucial for reducing uncertainties in sensitivity estimates for next-generation physics experiments operating in the keV--MeV range. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.07952v3-abstract-full').style.display = 'none'; document.getElementById('2405.07952v3-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">38 pages, 8 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/2305.09435">arXiv:2305.09435</a> <span> [<a href="https://arxiv.org/pdf/2305.09435">pdf</a>, <a href="https://arxiv.org/format/2305.09435">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="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/10.1007/JHEP09(2023)190">10.1007/JHEP09(2023)190 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Demonstration of neutrinoless double beta decay searches in gaseous xenon with NEXT </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Novella%2C+P">P. Novella</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorel%2C+M">M. Sorel</a>, <a href="/search/nucl-ex?searchtype=author&query=Us%C3%B3n%2C+A">A. Us贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/nucl-ex?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/nucl-ex?searchtype=author&query=Auria-Luna%2C+F">F. Auria-Luna</a>, <a href="/search/nucl-ex?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/nucl-ex?searchtype=author&query=del+Barrio-Torregrosa%2C+M">M. del Barrio-Torregrosa</a>, <a href="/search/nucl-ex?searchtype=author&query=Bayo%2C+A">A. Bayo</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Bounasser%2C+S">S. Bounasser</a>, <a href="/search/nucl-ex?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a> , et al. (90 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="2305.09435v4-abstract-short" style="display: inline;"> The NEXT experiment aims at the sensitive search of the neutrinoless double beta decay in $^{136}$Xe, using high-pressure gas electroluminescent time projection chambers. The NEXT-White detector is the first radiopure demonstrator of this technology, operated in the Laboratorio Subterr谩neo de Canfranc. Achieving an energy resolution of 1% FWHM at 2.6 MeV and further background rejection by means o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.09435v4-abstract-full').style.display = 'inline'; document.getElementById('2305.09435v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.09435v4-abstract-full" style="display: none;"> The NEXT experiment aims at the sensitive search of the neutrinoless double beta decay in $^{136}$Xe, using high-pressure gas electroluminescent time projection chambers. The NEXT-White detector is the first radiopure demonstrator of this technology, operated in the Laboratorio Subterr谩neo de Canfranc. Achieving an energy resolution of 1% FWHM at 2.6 MeV and further background rejection by means of the topology of the reconstructed tracks, NEXT-White has been exploited beyond its original goals in order to perform a neutrinoless double beta decay search. The analysis considers the combination of 271.6 days of $^{136}$Xe-enriched data and 208.9 days of $^{136}$Xe-depleted data. A detailed background modeling and measurement has been developed, ensuring the time stability of the radiogenic and cosmogenic contributions across both data samples. Limits to the neutrinoless mode are obtained in two alternative analyses: a background-model-dependent approach and a novel direct background-subtraction technique, offering results with small dependence on the background model assumptions. With a fiducial mass of only 3.50$\pm$0.01 kg of $^{136}$Xe-enriched xenon, 90% C.L. lower limits to the neutrinoless double beta decay are found in the T$_{1/2}^{0谓}>5.5\times10^{23}-1.3\times10^{24}$ yr range, depending on the method. The presented techniques stand as a proof-of-concept for the searches to be implemented with larger NEXT detectors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.09435v4-abstract-full').style.display = 'none'; document.getElementById('2305.09435v4-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 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 09 (2023) 190 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.01522">arXiv:2303.01522</a> <span> [<a href="https://arxiv.org/pdf/2303.01522">pdf</a>, <a href="https://arxiv.org/format/2303.01522">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> <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/10.1088/1748-0221/18/07/P07044">10.1088/1748-0221/18/07/P07044 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Compact Dication Source for Ba$^{2+}$ Tagging and Heavy Metal Ion Sensor Development </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Navarro%2C+K+E">K. E. Navarro</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=Baeza-Rubio%2C+J">J. Baeza-Rubio</a>, <a href="/search/nucl-ex?searchtype=author&query=Boyd%2C+M">M. Boyd</a>, <a href="/search/nucl-ex?searchtype=author&query=Denisenko%2C+A+A">A. A. Denisenko</a>, <a href="/search/nucl-ex?searchtype=author&query=Foss%2C+F+W">F. W. Foss</a>, <a href="/search/nucl-ex?searchtype=author&query=Giri%2C+S">S. Giri</a>, <a href="/search/nucl-ex?searchtype=author&query=Miller%2C+R">R. Miller</a>, <a href="/search/nucl-ex?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/nucl-ex?searchtype=author&query=Tiscareno%2C+M+R">M. R. Tiscareno</a>, <a href="/search/nucl-ex?searchtype=author&query=Samaniego%2C+F+J">F. J. Samaniego</a>, <a href="/search/nucl-ex?searchtype=author&query=Stogsdill%2C+K">K. Stogsdill</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/nucl-ex?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/nucl-ex?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a> , et al. (85 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="2303.01522v1-abstract-short" style="display: inline;"> We present a tunable metal ion beam that delivers controllable ion currents in the picoamp range for testing of dry-phase ion sensors. Ion beams are formed by sequential atomic evaporation and single or multiple electron impact ionization, followed by acceleration into a sensing region. Controllability of the ionic charge state is achieved through tuning of electrode potentials that influence the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.01522v1-abstract-full').style.display = 'inline'; document.getElementById('2303.01522v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.01522v1-abstract-full" style="display: none;"> We present a tunable metal ion beam that delivers controllable ion currents in the picoamp range for testing of dry-phase ion sensors. Ion beams are formed by sequential atomic evaporation and single or multiple electron impact ionization, followed by acceleration into a sensing region. Controllability of the ionic charge state is achieved through tuning of electrode potentials that influence the retention time in the ionization region. Barium, lead, and cobalt samples have been used to test the system, with ion currents identified and quantified using a quadrupole mass analyzer. Realization of a clean $\mathrm{Ba^{2+}}$ ion beam within a bench-top system represents an important technical advance toward the development and characterization of barium tagging systems for neutrinoless double beta decay searches in xenon gas. This system also provides a testbed for investigation of novel ion sensing methodologies for environmental assay applications, with dication beams of Pb$^{2+}$ and Cd$^{2+}$ also demonstrated for this purpose. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.01522v1-abstract-full').style.display = 'none'; document.getElementById('2303.01522v1-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 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.12616">arXiv:2111.12616</a> <span> [<a href="https://arxiv.org/pdf/2111.12616">pdf</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/10.1088/1742-6596/2156/1/012223">10.1088/1742-6596/2156/1/012223 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First results from the HENSA/ANAIS collaboration at the Canfranc Underground Laboratory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Mont-Geli%2C+N">N Mont-Geli</a>, <a href="/search/nucl-ex?searchtype=author&query=Tarife%C3%B1o-Saldivia%2C+A">A Tarife帽o-Saldivia</a>, <a href="/search/nucl-ex?searchtype=author&query=Orrigo%2C+S+E+A">S E A Orrigo</a>, <a href="/search/nucl-ex?searchtype=author&query=Tain%2C+J+L">J L Tain</a>, <a href="/search/nucl-ex?searchtype=author&query=Grieger%2C+M">M Grieger</a>, <a href="/search/nucl-ex?searchtype=author&query=Agramunt%2C+J">J Agramunt</a>, <a href="/search/nucl-ex?searchtype=author&query=Algora%2C+A">A Algora</a>, <a href="/search/nucl-ex?searchtype=author&query=Amar%C3%A9%2C+J">J Amar茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Bemmerer%2C+D">D Bemmerer</a>, <a href="/search/nucl-ex?searchtype=author&query=Calvi%C3%B1o%2C+F">F Calvi帽o</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Coarasa%2C+I">I Coarasa</a>, <a href="/search/nucl-ex?searchtype=author&query=Cort%C3%A9s%2C+G">G Cort茅s</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Blas%2C+A">A De Blas</a>, <a href="/search/nucl-ex?searchtype=author&query=Dillmann%2C+I">I Dillmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Fraile%2C+L+M">L M Fraile</a>, <a href="/search/nucl-ex?searchtype=author&query=Garc%C3%ADa%2C+E">E Garc铆a</a>, <a href="/search/nucl-ex?searchtype=author&query=Garc%C3%ADa%2C+R">R Garc铆a</a>, <a href="/search/nucl-ex?searchtype=author&query=Mart%C3%ADnez%2C+M">M Mart铆nez</a>, <a href="/search/nucl-ex?searchtype=author&query=Nacher%2C+E">E Nacher</a>, <a href="/search/nucl-ex?searchtype=author&query=Ortigoza%2C+Y">Y Ortigoza</a>, <a href="/search/nucl-ex?searchtype=author&query=Ortiz%2C+A">A Ortiz</a>, <a href="/search/nucl-ex?searchtype=author&query=Pall%C3%A0s%2C+M">M Pall脿s</a>, <a href="/search/nucl-ex?searchtype=author&query=Puimed%C3%B3n%2C+J">J Puimed贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Salinas%2C+A">A Salinas</a> , et al. (2 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="2111.12616v2-abstract-short" style="display: inline;"> The HENSA/ANAIS collaboration aims for the precise determination of the neutron flux that could affect ANAIS-112, an experiment looking for the dark matter annual modulation using NaI(Tl) scintillators. In this work, the first measurements of the neutron flux and Monte Carlo simulations of the neutron spectrum are reported. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.12616v2-abstract-full" style="display: none;"> The HENSA/ANAIS collaboration aims for the precise determination of the neutron flux that could affect ANAIS-112, an experiment looking for the dark matter annual modulation using NaI(Tl) scintillators. In this work, the first measurements of the neutron flux and Monte Carlo simulations of the neutron spectrum are reported. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.12616v2-abstract-full').style.display = 'none'; document.getElementById('2111.12616v2-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> 3 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.11091">arXiv:2111.11091</a> <span> [<a href="https://arxiv.org/pdf/2111.11091">pdf</a>, <a href="https://arxiv.org/format/2111.11091">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="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/PhysRevC.105.055501">10.1103/PhysRevC.105.055501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the ${}^{136}$Xe two-neutrino double beta decay half-life via direct background subtraction in NEXT </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Novella%2C+P">P. Novella</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorel%2C+M">M. Sorel</a>, <a href="/search/nucl-ex?searchtype=author&query=Us%C3%B3n%2C+A">A. Us贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/nucl-ex?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/nucl-ex?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Bounasser%2C+S">S. Bounasser</a>, <a href="/search/nucl-ex?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Contreras%2C+T">T. Contreras</a> , et al. (85 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="2111.11091v3-abstract-short" style="display: inline;"> We report a measurement of the half-life of the ${}^{136}$Xe two-neutrino double beta decay performed with a novel direct background subtraction technique. The analysis relies on the data collected with the NEXT-White detector operated with ${}^{136}$Xe-enriched and ${}^{136}$Xe-depleted xenon, as well as on the topology of double-electron tracks. With a fiducial mass of only 3.5 kg of Xe, a half-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.11091v3-abstract-full').style.display = 'inline'; document.getElementById('2111.11091v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.11091v3-abstract-full" style="display: none;"> We report a measurement of the half-life of the ${}^{136}$Xe two-neutrino double beta decay performed with a novel direct background subtraction technique. The analysis relies on the data collected with the NEXT-White detector operated with ${}^{136}$Xe-enriched and ${}^{136}$Xe-depleted xenon, as well as on the topology of double-electron tracks. With a fiducial mass of only 3.5 kg of Xe, a half-life of $2.34^{+0.80}_{-0.46}\textrm{(stat)}^{+0.30}_{-0.17}\textrm{(sys)}\times10^{21}~\textrm{yr}$ is derived from the background-subtracted energy spectrum. The presented technique demonstrates the feasibility of unique background-model-independent neutrinoless double beta decay searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.11091v3-abstract-full').style.display = 'none'; document.getElementById('2111.11091v3-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 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 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">9 pages, 7 figures, and 1 appendix</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 105, 055501 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.05902">arXiv:2109.05902</a> <span> [<a href="https://arxiv.org/pdf/2109.05902">pdf</a>, <a href="https://arxiv.org/format/2109.05902">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> <p class="title is-5 mathjax"> The Dynamics of Ions on Phased Radio-frequency Carpets in High Pressure Gases and Application for Barium Tagging in Xenon Gas Time Projection Chambers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=Raymond%2C+A">A. Raymond</a>, <a href="/search/nucl-ex?searchtype=author&query=Woodruff%2C+K">K. Woodruff</a>, <a href="/search/nucl-ex?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/nucl-ex?searchtype=author&query=Denisenko%2C+A+A">A. A. Denisenko</a>, <a href="/search/nucl-ex?searchtype=author&query=Foss%2C+F+W">F. W. Foss</a>, <a href="/search/nucl-ex?searchtype=author&query=Navarro%2C+K">K. Navarro</a>, <a href="/search/nucl-ex?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/nucl-ex?searchtype=author&query=Vuong%2C+T+T">T. T. Vuong</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/nucl-ex?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/nucl-ex?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Bounasser%2C+S">S. Bounasser</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a> , et al. (85 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="2109.05902v2-abstract-short" style="display: inline;"> Radio-frequency (RF) carpets with ultra-fine pitches are examined for ion transport in gases at atmospheric pressures and above. We develop new analytic and computational methods for modeling RF ion transport at densities where dynamics are strongly influenced by buffer gas collisions. An analytic description of levitating and sweeping forces from phased arrays is obtained, then thermodynamic and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.05902v2-abstract-full').style.display = 'inline'; document.getElementById('2109.05902v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.05902v2-abstract-full" style="display: none;"> Radio-frequency (RF) carpets with ultra-fine pitches are examined for ion transport in gases at atmospheric pressures and above. We develop new analytic and computational methods for modeling RF ion transport at densities where dynamics are strongly influenced by buffer gas collisions. An analytic description of levitating and sweeping forces from phased arrays is obtained, then thermodynamic and kinetic principles are used to calculate ion loss rates in the presence of collisions. This methodology is validated against detailed microscopic SIMION simulations. We then explore a parameter space of special interest for neutrinoless double beta decay experiments: transport of barium ions in xenon at pressures from 1 to 10 bar. Our computations account for molecular ion formation and pressure dependent mobility as well as finite temperature effects. We discuss the challenges associated with achieving suitable operating conditions, which lie beyond the capabilities of existing devices, using presently available or near-future manufacturing techniques. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.05902v2-abstract-full').style.display = 'none'; document.getElementById('2109.05902v2-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 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">26 pages, 16 figures v2: author list update and pre-journal submission adjustments</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.02381">arXiv:2010.02381</a> <span> [<a href="https://arxiv.org/pdf/2010.02381">pdf</a>, <a href="https://arxiv.org/format/2010.02381">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="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/10.3390/universe6100162">10.3390/universe6100162 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Cosmogenic activation in double beta decay experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Cebrian%2C+S">Susana Cebrian</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="2010.02381v2-abstract-short" style="display: inline;"> Double beta decay is a very rare nuclear process and, therefore, experiments intended to detect it must be operated deep underground and in ultra-low background conditions. Long-lived radioisotopes produced by the previous exposure of materials to cosmic rays on the Earth's surface or even underground can become problematic for the required sensitivity. Here, the studies developed to quantify and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.02381v2-abstract-full').style.display = 'inline'; document.getElementById('2010.02381v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.02381v2-abstract-full" style="display: none;"> Double beta decay is a very rare nuclear process and, therefore, experiments intended to detect it must be operated deep underground and in ultra-low background conditions. Long-lived radioisotopes produced by the previous exposure of materials to cosmic rays on the Earth's surface or even underground can become problematic for the required sensitivity. Here, the studies developed to quantify and reduce the activation yields in detectors and materials used in the set-up of these experiments will be reviewed, considering target materials like germanium, tellurium and xenon together with other ones commonly used like copper, lead, stainless steel or argon. Calculations following very different approaches and measurements from irradiation experiments using beams or directly cosmic rays will be considered for relevant radioisotopes. The effect of cosmogenic activation in present and future double beta decay projects based on different types of detectors will be analyzed too. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.02381v2-abstract-full').style.display = 'none'; document.getElementById('2010.02381v2-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, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 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">Table 3 revised</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Universe 2020, 6, 162 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2008.06426">arXiv:2008.06426</a> <span> [<a href="https://arxiv.org/pdf/2008.06426">pdf</a>, <a href="https://arxiv.org/format/2008.06426">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="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/10.1016/j.ppnp.2020.103807">10.1016/j.ppnp.2020.103807 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Double Beta Decay Experiments at Canfranc Underground Laboratory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Cebrian%2C+S">Susana Cebrian</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="2008.06426v1-abstract-short" style="display: inline;"> The first activities of the Canfranc Underground Laboratory ("Laboratorio Subterr谩neo de Canfranc", LSC) started in the mid-eighties in a railway tunnel located under the Spanish Pyrenees; since then, it has become an international multidisciplinary facility equipped with different services for underground science. The research activity at LSC is about Astroparticle Physics, dark matter searches a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2008.06426v1-abstract-full').style.display = 'inline'; document.getElementById('2008.06426v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2008.06426v1-abstract-full" style="display: none;"> The first activities of the Canfranc Underground Laboratory ("Laboratorio Subterr谩neo de Canfranc", LSC) started in the mid-eighties in a railway tunnel located under the Spanish Pyrenees; since then, it has become an international multidisciplinary facility equipped with different services for underground science. The research activity at LSC is about Astroparticle Physics, dark matter searches and neutrino Physics; but also activities in Nuclear Astrophysics, Geophysics, and Biology are carried out. The investigation of the neutrinoless double beta decay has been one of the main research lines of LSC since the beginning. Many unknowns remain in the characterization of the basic neutrino properties and the study of this rare decay process requiring Physics beyond the Standard Model of Particle Physics can shed light on the lepton number conservation, the nature of the neutrinos as Dirac or Majorana particles and the absolute scale and ordering of the masses of the three generations. Here, the double beta decay searches performed at LSC for different emitters and following very different experimental approaches will be reviewed: from the very first experiments in the laboratory including the successful IGEX for $^{76}$Ge, which released very stringent limits to the effective neutrino mass at the time, to the present NEXT experiment for $^{136}$Xe and future project CROSS ("Cryogenic Rare-event Observatory with Surface Sensitivity") for $^{130}$Te and $^{100}$Mo, both implementing innovative detector technologies to discriminate backgrounds. For the neutrinoless double beta decay channel and at 90% C.L., IGEX derived a limit to the half-life of $^{76}$Ge of $T_{1/2}^{0谓} > 1.57 \times 10^{25}$ y while the corresponding expected limits are $T_{1/2}^{0谓} > 1.0\times 10^{26}$ y for $^{136}$Xe from NEXT-100 (for an exposure of 500 kg.y) and $T_{1/2}^{0谓} > 2.8 \times 10^{25}$ y for $^{100}$Mo from CROSS (for 5 y and 4.7 kg of isotope). Activities related to double beta decays searches carried out in other underground laboratories have also been developed at LSC and will be presented too, like the operation of the BiPo-3 detector for radiopurity measurements of thin sheets with very high sensitivity. For each one of these experiments, the concept, the experimental set-ups and relevant results will be discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2008.06426v1-abstract-full').style.display = 'none'; document.getElementById('2008.06426v1-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> 14 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">Final version. Abbreviated abstract</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Progress in Particle and Nuclear Physics 114 (2020) 103807 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.07320">arXiv:2006.07320</a> <span> [<a href="https://arxiv.org/pdf/2006.07320">pdf</a>, <a href="https://arxiv.org/format/2006.07320">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> <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/10.1007/JHEP02(2021)203">10.1007/JHEP02(2021)203 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Sensitivity of the NEXT experiment to Xe-124 double electron capture </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Mart%C3%ADnez-Lema%2C+G">G. Mart铆nez-Lema</a>, <a href="/search/nucl-ex?searchtype=author&query=Mart%C3%ADnez-Vara%2C+M">M. Mart铆nez-Vara</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorel%2C+M">M. Sorel</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Alvarez%2C+V">V. Alvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+G">G. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/nucl-ex?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Felkai%2C+R">R. Felkai</a> , et al. (66 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="2006.07320v3-abstract-short" style="display: inline;"> Double electron capture by proton-rich nuclei is a second-order nuclear process analogous to double beta decay. Despite their similarities, the decay signature is quite different, potentially providing a new channel to measure the hypothesized neutrinoless mode of these decays. The Standard-Model-allowed two-neutrino double electron capture ($2谓ECEC$) has been predicted for a number of isotopes, b… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.07320v3-abstract-full').style.display = 'inline'; document.getElementById('2006.07320v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.07320v3-abstract-full" style="display: none;"> Double electron capture by proton-rich nuclei is a second-order nuclear process analogous to double beta decay. Despite their similarities, the decay signature is quite different, potentially providing a new channel to measure the hypothesized neutrinoless mode of these decays. The Standard-Model-allowed two-neutrino double electron capture ($2谓ECEC$) has been predicted for a number of isotopes, but only observed in $^{78}$Kr, $^{130}$Ba and, recently, $^{124}$Xe. The sensitivity to this decay establishes a benchmark for the ultimate experimental goal, namely the potential to discover also the lepton-number-violating neutrinoless version of this process, $0谓ECEC$. Here we report on the current sensitivity of the NEXT-White detector to $^{124}$Xe $2谓ECEC$ and on the extrapolation to NEXT-100. Using simulated data for the $2谓ECEC$ signal and real data from NEXT-White operated with $^{124}$Xe-depleted gas as background, we define an optimal event selection that maximizes the NEXT-White sensitivity. We estimate that, for NEXT-100 operated with xenon gas isotopically enriched with 1 kg of $^{124}$Xe and for a 5-year run, a sensitivity to the $2谓ECEC$ half-life of $6 \times 10^{22}$ y (at 90% confidence level) or better can be reached. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.07320v3-abstract-full').style.display = 'none'; document.getElementById('2006.07320v3-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 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 June, 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">23 pages, 13 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. High Energ. Phys. 2021, 203 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.06467">arXiv:2005.06467</a> <span> [<a href="https://arxiv.org/pdf/2005.06467">pdf</a>, <a href="https://arxiv.org/format/2005.06467">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> <p class="title is-5 mathjax"> Sensitivity of a tonne-scale NEXT detector for neutrinoless double beta decay searches </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/nucl-ex?searchtype=author&query=Denisenko%2C+A+A">A. A. Denisenko</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+G">G. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Felkai%2C+R">R. Felkai</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a> , et al. (74 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="2005.06467v2-abstract-short" style="display: inline;"> The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta decay of Xe-136 using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version of this technology with about 1 tonne of enriched xenon could reach in less than 5 years of operation a sensitivity to the half-life of neutrinoless double-beta decay decay better than 1E27 years, imp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.06467v2-abstract-full').style.display = 'inline'; document.getElementById('2005.06467v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.06467v2-abstract-full" style="display: none;"> The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta decay of Xe-136 using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version of this technology with about 1 tonne of enriched xenon could reach in less than 5 years of operation a sensitivity to the half-life of neutrinoless double-beta decay decay better than 1E27 years, improving the current limits by at least one order of magnitude. This prediction is based on a well-understood background model dominated by radiogenic sources. The detector concept presented here represents a first step on a compelling path towards sensitivity to the parameter space defined by the inverted ordering of neutrino masses, and beyond. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.06467v2-abstract-full').style.display = 'none'; document.getElementById('2005.06467v2-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 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">22 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/1909.05860">arXiv:1909.05860</a> <span> [<a href="https://arxiv.org/pdf/1909.05860">pdf</a>, <a href="https://arxiv.org/format/1909.05860">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/10.1088/1748-0221/15/04/P04022">10.1088/1748-0221/15/04/P04022 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Radio Frequency and DC High Voltage Breakdown of High Pressure Helium, Argon, and Xenon </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Woodruff%2C+K">K. Woodruff</a>, <a href="/search/nucl-ex?searchtype=author&query=Baeza-Rubio%2C+J">J. Baeza-Rubio</a>, <a href="/search/nucl-ex?searchtype=author&query=Huerta%2C+D">D. Huerta</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=McDonald%2C+A+D">A. D. McDonald</a>, <a href="/search/nucl-ex?searchtype=author&query=Norman%2C+L">L. Norman</a>, <a href="/search/nucl-ex?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Byrnes%2C+N+K">N. K. Byrnes</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/nucl-ex?searchtype=author&query=Denisenko%2C+A+A">A. A. Denisenko</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+G">G. D铆az</a> , et al. (69 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="1909.05860v3-abstract-short" style="display: inline;"> Motivated by the possibility of guiding daughter ions from double beta decay events to single-ion sensors for barium tagging, the NEXT collaboration is developing a program of R&D to test radio frequency (RF) carpets for ion transport in high pressure xenon gas. This would require carpet functionality in regimes at higher pressures than have been previously reported, implying correspondingly large… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.05860v3-abstract-full').style.display = 'inline'; document.getElementById('1909.05860v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1909.05860v3-abstract-full" style="display: none;"> Motivated by the possibility of guiding daughter ions from double beta decay events to single-ion sensors for barium tagging, the NEXT collaboration is developing a program of R&D to test radio frequency (RF) carpets for ion transport in high pressure xenon gas. This would require carpet functionality in regimes at higher pressures than have been previously reported, implying correspondingly larger electrode voltages than in existing systems. This mode of operation appears plausible for contemporary RF-carpet geometries due to the higher predicted breakdown strength of high pressure xenon relative to low pressure helium, the working medium in most existing RF carpet devices. In this paper we present the first measurements of the high voltage dielectric strength of xenon gas at high pressure and at the relevant RF frequencies for ion transport (in the 10 MHz range), as well as new DC and RF measurements of the dielectric strengths of high pressure argon and helium gases at small gap sizes. We find breakdown voltages that are compatible with stable RF carpet operation given the gas, pressure, voltage, materials and geometry of interest. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.05860v3-abstract-full').style.display = 'none'; document.getElementById('1909.05860v3-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 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1902.05544">arXiv:1902.05544</a> <span> [<a href="https://arxiv.org/pdf/1902.05544">pdf</a>, <a href="https://arxiv.org/format/1902.05544">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/10.1088/1748-0221/14/08/P08009">10.1088/1748-0221/14/08/P08009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electron Drift and Longitudinal Diffusion in High Pressure Xenon-Helium Gas Mixtures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=McDonald%2C+A+D">A. D. McDonald</a>, <a href="/search/nucl-ex?searchtype=author&query=Woodruff%2C+K">K. Woodruff</a>, <a href="/search/nucl-ex?searchtype=author&query=Atoum%2C+B+A">B. Al Atoum</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+G">G. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/nucl-ex?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Felkai%2C+R">R. Felkai</a> , et al. (61 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="1902.05544v4-abstract-short" style="display: inline;"> We report new measurements of the drift velocity and longitudinal diffusion coefficients of electrons in pure xenon gas and in xenon-helium gas mixtures at 1-9 bar and electric field strengths of 50-300 V/cm. In pure xenon we find excellent agreement with world data at all $E/P$, for both drift velocity and diffusion coefficients. However, a larger value of the longitudinal diffusion coefficient t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.05544v4-abstract-full').style.display = 'inline'; document.getElementById('1902.05544v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1902.05544v4-abstract-full" style="display: none;"> We report new measurements of the drift velocity and longitudinal diffusion coefficients of electrons in pure xenon gas and in xenon-helium gas mixtures at 1-9 bar and electric field strengths of 50-300 V/cm. In pure xenon we find excellent agreement with world data at all $E/P$, for both drift velocity and diffusion coefficients. However, a larger value of the longitudinal diffusion coefficient than theoretical predictions is found at low $E/P$ in pure xenon, below the range of reduced fields usually probed by TPC experiments. A similar effect is observed in xenon-helium gas mixtures at somewhat larger $E/P$. Drift velocities in xenon-helium mixtures are found to be theoretically well predicted. Although longitudinal diffusion in xenon-helium mixtures is found to be larger than anticipated, extrapolation based on the measured longitudinal diffusion coefficients suggest that the use of helium additives to reduce transverse diffusion in xenon gas remains a promising prospect. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.05544v4-abstract-full').style.display = 'none'; document.getElementById('1902.05544v4-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 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1804.01680">arXiv:1804.01680</a> <span> [<a href="https://arxiv.org/pdf/1804.01680">pdf</a>, <a href="https://arxiv.org/format/1804.01680">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> <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/10.1088/1748-0221/13/07/P07013">10.1088/1748-0221/13/07/P07013 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electron drift properties in high pressure gaseous xenon </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Sim%C3%B3n%2C+A">A. Sim贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Felkai%2C+R">R. Felkai</a>, <a href="/search/nucl-ex?searchtype=author&query=Mart%C3%ADnez-Lema%2C+G">G. Mart铆nez-Lema</a>, <a href="/search/nucl-ex?searchtype=author&query=Monrabal%2C+F">F. Monrabal</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorel%2C+M">M. Sorel</a>, <a href="/search/nucl-ex?searchtype=author&query=Morata%2C+J+A+H">J. A. Hernando Morata</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Botas%2C+A">A. Botas</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/nucl-ex?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a> , et al. (51 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="1804.01680v3-abstract-short" style="display: inline;"> Gaseous time projection chambers (TPC) are a very attractive detector technology for particle tracking. Characterization of both drift velocity and diffusion is of great importance to correctly assess their tracking capabilities. NEXT-White is a High Pressure Xenon gas TPC with electroluminescent amplification, a 1:2 scale model of the future NEXT-100 detector, which will be dedicated to neutrinol… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.01680v3-abstract-full').style.display = 'inline'; document.getElementById('1804.01680v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.01680v3-abstract-full" style="display: none;"> Gaseous time projection chambers (TPC) are a very attractive detector technology for particle tracking. Characterization of both drift velocity and diffusion is of great importance to correctly assess their tracking capabilities. NEXT-White is a High Pressure Xenon gas TPC with electroluminescent amplification, a 1:2 scale model of the future NEXT-100 detector, which will be dedicated to neutrinoless double beta decay searches. NEXT-White has been operating at Canfranc Underground Laboratory (LSC) since December 2016. The drift parameters have been measured using $^{83m}$Kr for a range of reduced drift fields at two different pressure regimes, namely 7.2 bar and 9.1 bar. The results have been compared with Magboltz simulations. Agreement at the 5% level or better has been found for drift velocity, longitudinal diffusion and transverse diffusion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.01680v3-abstract-full').style.display = 'none'; document.getElementById('1804.01680v3-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 May, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">22 pages, 17 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/1804.00471">arXiv:1804.00471</a> <span> [<a href="https://arxiv.org/pdf/1804.00471">pdf</a>, <a href="https://arxiv.org/format/1804.00471">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Measurement of radon-induced backgrounds in the NEXT double beta decay experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Novella%2C+P">P. Novella</a>, <a href="/search/nucl-ex?searchtype=author&query=Palmeiro%2C+B">B. Palmeiro</a>, <a href="/search/nucl-ex?searchtype=author&query=Sim%C3%B3n%2C+A">A. Sim贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorel%2C+M">M. Sorel</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Mart%C3%ADnez-Lema%2C+G">G. Mart铆nez-Lema</a>, <a href="/search/nucl-ex?searchtype=author&query=Monrabal%2C+F">F. Monrabal</a>, <a href="/search/nucl-ex?searchtype=author&query=Zuzel%2C+G">G. Zuzel</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Botas%2C+A">A. Botas</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a> , et al. (57 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="1804.00471v3-abstract-short" style="display: inline;"> The measurement of the internal $^{222}$Rn activity in the NEXT-White detector during the so-called Run-II period with $^{136}$Xe-depleted xenon is discussed in detail, together with its implications for double beta decay searches in NEXT. The activity is measured through the alpha production rate induced in the fiducial volume by $^{222}$Rn and its alpha-emitting progeny. The specific activity is… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.00471v3-abstract-full').style.display = 'inline'; document.getElementById('1804.00471v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.00471v3-abstract-full" style="display: none;"> The measurement of the internal $^{222}$Rn activity in the NEXT-White detector during the so-called Run-II period with $^{136}$Xe-depleted xenon is discussed in detail, together with its implications for double beta decay searches in NEXT. The activity is measured through the alpha production rate induced in the fiducial volume by $^{222}$Rn and its alpha-emitting progeny. The specific activity is measured to be $(38.1\pm 2.2~\mathrm{(stat.)}\pm 5.9~\mathrm{(syst.)})$~mBq/m$^3$. Radon-induced electrons have also been characterized from the decay of the $^{214}$Bi daughter ions plating out on the cathode of the time projection chamber. From our studies, we conclude that radon-induced backgrounds are sufficiently low to enable a successful NEXT-100 physics program, as the projected rate contribution should not exceed 0.1~counts/yr in the neutrinoless double beta decay sample. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.00471v3-abstract-full').style.display = 'none'; document.getElementById('1804.00471v3-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 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">28 pages, 10 figures, 6 tables. Version accepted for publication in JHEP</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1711.04782">arXiv:1711.04782</a> <span> [<a href="https://arxiv.org/pdf/1711.04782">pdf</a>, <a href="https://arxiv.org/format/1711.04782">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> <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/10.1103/PhysRevLett.120.132504">10.1103/PhysRevLett.120.132504 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Demonstration of Single Barium Ion Sensitivity for Neutrinoless Double Beta Decay using Single Molecule Fluorescence Imaging </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=McDonald%2C+A+D">A. D. McDonald</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=Alvarez%2C+V">V. Alvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C4%B1guez%2C+J+M">J. M. Benlloch-Rodr谋guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Botas%2C+A">A. Botas</a>, <a href="/search/nucl-ex?searchtype=author&query=Carcel%2C+S">S. Carcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Carrion%2C+J+V">J. V. Carrion</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C4%B1az%2C+J">J. D谋az</a>, <a href="/search/nucl-ex?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/nucl-ex?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Felkai%2C+R">R. Felkai</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/nucl-ex?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/nucl-ex?searchtype=author&query=Gomez-Cadenas%2C+J+J">J. J. Gomez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonzalez-D%C4%B1az%2C+D">D. Gonzalez-D谋az</a> , et al. (49 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="1711.04782v3-abstract-short" style="display: inline;"> A new method to tag the barium daughter in the double beta decay of $^{136}$Xe is reported. Using the technique of single molecule fluorescent imaging (SMFI), individual barium dication (Ba$^{++}$) resolution at a transparent scanning surface has been demonstrated. A single-step photo-bleach confirms the single ion interpretation. Individual ions are localized with super-resolution ($\sim$2~nm), a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.04782v3-abstract-full').style.display = 'inline'; document.getElementById('1711.04782v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1711.04782v3-abstract-full" style="display: none;"> A new method to tag the barium daughter in the double beta decay of $^{136}$Xe is reported. Using the technique of single molecule fluorescent imaging (SMFI), individual barium dication (Ba$^{++}$) resolution at a transparent scanning surface has been demonstrated. A single-step photo-bleach confirms the single ion interpretation. Individual ions are localized with super-resolution ($\sim$2~nm), and detected with a statistical significance of 12.9~$蟽$ over backgrounds. This lays the foundation for a new and potentially background-free neutrinoless double beta decay technology, based on SMFI coupled to high pressure xenon gas time projection chambers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.04782v3-abstract-full').style.display = 'none'; document.getElementById('1711.04782v3-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 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 November, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2017. </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">Accepted by PRL</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 120, 132504 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.05600">arXiv:1710.05600</a> <span> [<a href="https://arxiv.org/pdf/1710.05600">pdf</a>, <a href="https://arxiv.org/format/1710.05600">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> <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.2018.07.013">10.1016/j.nima.2018.07.013 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Helium-Xenon mixtures to improve topological signature in high pressure gas Xenon TPCs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Felkai%2C+R">R. Felkai</a>, <a href="/search/nucl-ex?searchtype=author&query=Monrabal%2C+F">F. Monrabal</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonzalez-D%C3%ADaz%2C+D">D. Gonzalez-D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Sorel%2C+M">M. Sorel</a>, <a href="/search/nucl-ex?searchtype=author&query=L%C3%B3pez-March%2C+N">N. L贸pez-March</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Botas%2C+A">A. Botas</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/nucl-ex?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a> , et al. (50 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="1710.05600v4-abstract-short" style="display: inline;"> Within the framework of xenon-based double beta decay experiments, we propose the possibility to improve the background rejection of an electroluminescent Time Projection Chamber (EL TPC) by reducing the diffusion of the drifting electrons while keeping nearly intact the energy resolution of a pure xenon EL TPC. Based on state-of-the-art microscopic simulations, a substantial addition of helium, a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.05600v4-abstract-full').style.display = 'inline'; document.getElementById('1710.05600v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.05600v4-abstract-full" style="display: none;"> Within the framework of xenon-based double beta decay experiments, we propose the possibility to improve the background rejection of an electroluminescent Time Projection Chamber (EL TPC) by reducing the diffusion of the drifting electrons while keeping nearly intact the energy resolution of a pure xenon EL TPC. Based on state-of-the-art microscopic simulations, a substantial addition of helium, around 10 or 15~\%, may reduce drastically the transverse diffusion down to 2.5~mm/$\sqrt{\mathrm{m}}$ from the 10.5~mm/$\sqrt{\mathrm{m}}$ of pure xenon. The longitudinal diffusion remains around 4~mm/$\sqrt{\mathrm{m}}$. Light production studies have been performed as well. They show that the relative variation in energy resolution introduced by such a change does not exceed a few percent, which leaves the energy resolution practically unchanged. The technical caveats of using photomultipliers close to an helium atmosphere are also discussed in detail. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.05600v4-abstract-full').style.display = 'none'; document.getElementById('1710.05600v4-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 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </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, 7 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/1708.07449">arXiv:1708.07449</a> <span> [<a href="https://arxiv.org/pdf/1708.07449">pdf</a>, <a href="https://arxiv.org/ps/1708.07449">ps</a>, <a href="https://arxiv.org/format/1708.07449">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="High Energy Astrophysical Phenomena">astro-ph.HE</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 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/10.1142/S0217751X17430060">10.1142/S0217751X17430060 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Cosmogenic activation of materials </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Cebrian%2C+S">Susana Cebrian</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="1708.07449v1-abstract-short" style="display: inline;"> Experiments looking for rare events like the direct detection of dark matter particles, neutrino interactions or the nuclear double beta decay are operated deep underground to suppress the effect of cosmic rays. But the production of radioactive isotopes in materials due to previous exposure to cosmic rays is an hazard when ultra-low background conditions are required. In this context, the generat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.07449v1-abstract-full').style.display = 'inline'; document.getElementById('1708.07449v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1708.07449v1-abstract-full" style="display: none;"> Experiments looking for rare events like the direct detection of dark matter particles, neutrino interactions or the nuclear double beta decay are operated deep underground to suppress the effect of cosmic rays. But the production of radioactive isotopes in materials due to previous exposure to cosmic rays is an hazard when ultra-low background conditions are required. In this context, the generation of long-lived products by cosmic nucleons has been studied for many detector media and for other materials commonly used. Here, the main results obtained on the quantification of activation yields on the Earth's surface will be summarized, considering both measurements and calculations following different approaches. The isotope production cross sections and the cosmic ray spectrum are the two main ingredients when calculating this cosmogenic activation; the different alternatives for implementing them will be discussed. Activation that can take place deep underground mainly due to cosmic muons will be briefly commented too. Presently, the experimental results for the cosmogenic production of radioisotopes are scarce and discrepancies between different calculations are important in many cases, but the increasing interest on this background source which is becoming more and more relevant can help to change this situation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.07449v1-abstract-full').style.display = 'none'; document.getElementById('1708.07449v1-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 August, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2017. </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">30 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> International Journal of Modern Physics A 32 (2017) 1743006 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1706.06012">arXiv:1706.06012</a> <span> [<a href="https://arxiv.org/pdf/1706.06012">pdf</a>, <a href="https://arxiv.org/ps/1706.06012">ps</a>, <a href="https://arxiv.org/format/1706.06012">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> <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/10.1088/1748-0221/12/08/T08003">10.1088/1748-0221/12/08/T08003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Radiopurity assessment of the energy readout for the NEXT double beta decay experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=P%C3%A9rez%2C+J">J. P茅rez</a>, <a href="/search/nucl-ex?searchtype=author&query=Bandac%2C+I">I. Bandac</a>, <a href="/search/nucl-ex?searchtype=author&query=Labarga%2C+L">L. Labarga</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Botas%2C+A">A. Botas</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/nucl-ex?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Felkai%2C+R">R. Felkai</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/nucl-ex?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Guti%C3%A9rrez%2C+R+M">R. M. Guti茅rrez</a> , et al. (45 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="1706.06012v2-abstract-short" style="display: inline;"> The Neutrino Experiment with a Xenon Time-Projection Chamber (NEXT) experiment intends to investigate the neutrinoless double beta decay of 136Xe, and therefore requires a severe suppression of potential backgrounds. An extensive material screening and selection process was undertaken to quantify the radioactivity of the materials used in the experiment. Separate energy and tracking readout planes… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1706.06012v2-abstract-full').style.display = 'inline'; document.getElementById('1706.06012v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1706.06012v2-abstract-full" style="display: none;"> The Neutrino Experiment with a Xenon Time-Projection Chamber (NEXT) experiment intends to investigate the neutrinoless double beta decay of 136Xe, and therefore requires a severe suppression of potential backgrounds. An extensive material screening and selection process was undertaken to quantify the radioactivity of the materials used in the experiment. Separate energy and tracking readout planes using different sensors allow us to combine the measurement of the topological signature of the event for background discrimination with the energy resolution optimization. The design of radiopure readout planes, in direct contact with the gas detector medium, was especially challenging since the required components typically have activities too large for experiments demanding ultra-low background conditions. After studying the tracking plane, here the radiopurity control of the energy plane is presented, mainly based on gamma-ray spectroscopy using ultra-low background germanium detectors at the Laboratorio Subterr谩neo de Canfranc (Spain). All the available units of the selected model of photomultiplier have been screened together with most of the components for the bases, enclosures and windows. According to these results for the activity of the relevant radioisotopes, the selected components of the energy plane would give a contribution to the overall background level in the region of interest of at most 2.4 x 10-4 counts keV-1 kg-1 y-1, satisfying the sensitivity requirements of the NEXT experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1706.06012v2-abstract-full').style.display = 'none'; document.getElementById('1706.06012v2-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 August, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 June, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2017. </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">Final version for publication</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2017 JINST 12 T08003 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1704.06861">arXiv:1704.06861</a> <span> [<a href="https://arxiv.org/pdf/1704.06861">pdf</a>, <a href="https://arxiv.org/ps/1704.06861">ps</a>, <a href="https://arxiv.org/format/1704.06861">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="Nuclear Experiment">nucl-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"> Annual modulation of dark matter: The ANAIS-112 case </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Coarasa%2C+I">I. Coarasa</a>, <a href="/search/nucl-ex?searchtype=author&query=Amar%C3%A9%2C+J">J. Amar茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cuesta%2C+C">C. Cuesta</a>, <a href="/search/nucl-ex?searchtype=author&query=Garc%C3%ADa%2C+E">E. Garc铆a</a>, <a href="/search/nucl-ex?searchtype=author&query=Mart%C3%ADnez%2C+M">M. Mart铆nez</a>, <a href="/search/nucl-ex?searchtype=author&query=Oliv%C3%A1n%2C+M+A">M. A. Oliv谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Ortigoza%2C+Y">Y. Ortigoza</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Sol%C3%B3rzano%2C+A+O">A. Ortiz de Sol贸rzano</a>, <a href="/search/nucl-ex?searchtype=author&query=Puimed%C3%B3n%2C+J">J. Puimed贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Sarsa%2C+M+L">M. L. Sarsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+J+A">J. A. Villar</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+P">P. Villar</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="1704.06861v1-abstract-short" style="display: inline;"> The annual modulation measured by the DAMA/LIBRA experiment can be explained by the interaction of dark matter WIMPs in NaI(Tl) scintillator detectors. Other experiments, with different targets or techniques, exclude the region of parameters singled out by DAMA/LIBRA, but the comparison of their results relies on several hypotheses regarding the dark matter model. ANAIS-112 is a dark matter search… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.06861v1-abstract-full').style.display = 'inline'; document.getElementById('1704.06861v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1704.06861v1-abstract-full" style="display: none;"> The annual modulation measured by the DAMA/LIBRA experiment can be explained by the interaction of dark matter WIMPs in NaI(Tl) scintillator detectors. Other experiments, with different targets or techniques, exclude the region of parameters singled out by DAMA/LIBRA, but the comparison of their results relies on several hypotheses regarding the dark matter model. ANAIS-112 is a dark matter search with 112.5 kg of NaI(Tl) scintillators under commissioning at the Canfranc Underground Laboratory (LSC) to test the DAMA/LIBRA result in a model independent way. We analyze its prospects in terms of the a priori critical and detection limits of the experiment. The analysis is based on the detector response and the background level measured for the first modules operated in Canfranc. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.06861v1-abstract-full').style.display = 'none'; document.getElementById('1704.06861v1-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 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2017. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1610.08883">arXiv:1610.08883</a> <span> [<a href="https://arxiv.org/pdf/1610.08883">pdf</a>, <a href="https://arxiv.org/format/1610.08883">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> PandaX-III: Searching for Neutrinoless Double Beta Decay with High Pressure $^{136}$Xe Gas Time Projection Chambers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+X">Xun Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Fu%2C+C">Changbo Fu</a>, <a href="/search/nucl-ex?searchtype=author&query=Galan%2C+J">Javier Galan</a>, <a href="/search/nucl-ex?searchtype=author&query=Giboni%2C+K">Karl Giboni</a>, <a href="/search/nucl-ex?searchtype=author&query=Giuliani%2C+F">Franco Giuliani</a>, <a href="/search/nucl-ex?searchtype=author&query=Gu%2C+L">Linghui Gu</a>, <a href="/search/nucl-ex?searchtype=author&query=Han%2C+K">Ke Han</a>, <a href="/search/nucl-ex?searchtype=author&query=Ji%2C+X">Xiangdong Ji</a>, <a href="/search/nucl-ex?searchtype=author&query=Lin%2C+H">Heng Lin</a>, <a href="/search/nucl-ex?searchtype=author&query=Liu%2C+J">Jianglai Liu</a>, <a href="/search/nucl-ex?searchtype=author&query=Ni%2C+K">Kaixiang Ni</a>, <a href="/search/nucl-ex?searchtype=author&query=Kusano%2C+H">Hiroki Kusano</a>, <a href="/search/nucl-ex?searchtype=author&query=Ren%2C+X">Xiangxiang Ren</a>, <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+S">Shaobo Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Yang%2C+Y">Yong Yang</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+D">Dan Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+T">Tao Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhao%2C+L">Li Zhao</a>, <a href="/search/nucl-ex?searchtype=author&query=Sun%2C+X">Xiangming Sun</a>, <a href="/search/nucl-ex?searchtype=author&query=Hu%2C+S">Shouyang Hu</a>, <a href="/search/nucl-ex?searchtype=author&query=Jian%2C+S">Siyu Jian</a>, <a href="/search/nucl-ex?searchtype=author&query=Li%2C+X">Xinglong Li</a>, <a href="/search/nucl-ex?searchtype=author&query=Li%2C+X">Xiaomei Li</a>, <a href="/search/nucl-ex?searchtype=author&query=Liang%2C+H">Hao Liang</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+H">Huanqiao Zhang</a> , et al. (45 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="1610.08883v2-abstract-short" style="display: inline;"> Searching for the Neutrinoless Double Beta Decay (NLDBD) is now regarded as the topmost promising technique to explore the nature of neutrinos after the discovery of neutrino masses in oscillation experiments. PandaX-III (Particle And Astrophysical Xenon Experiment III) will search for the NLDBD of $^{136}$Xe at the China Jin Ping underground Laboratory (CJPL). In the first phase of the experiment… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.08883v2-abstract-full').style.display = 'inline'; document.getElementById('1610.08883v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1610.08883v2-abstract-full" style="display: none;"> Searching for the Neutrinoless Double Beta Decay (NLDBD) is now regarded as the topmost promising technique to explore the nature of neutrinos after the discovery of neutrino masses in oscillation experiments. PandaX-III (Particle And Astrophysical Xenon Experiment III) will search for the NLDBD of $^{136}$Xe at the China Jin Ping underground Laboratory (CJPL). In the first phase of the experiment, a high pressure gas Time Projection Chamber (TPC) will contain 200 kg, 90% $^{136}$Xe enriched gas operated at 10 bar. Fine pitch micro-pattern gas detector (Microbulk Micromegas) will be used at both ends of the TPC for the charge readout with a cathode in the middle. Charge signals can be used to reconstruct tracks of NLDBD events and provide good energy and spatial resolution. The detector will be immersed in a large water tank to ensure $\sim$5 m of water shielding in all directions. The second phase, a ton-scale experiment, will consist of five TPCs in the same water tank, with improved energy resolution and better control over backgrounds. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.08883v2-abstract-full').style.display = 'none'; document.getElementById('1610.08883v2-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 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2016. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1604.05587">arXiv:1604.05587</a> <span> [<a href="https://arxiv.org/pdf/1604.05587">pdf</a>, <a href="https://arxiv.org/ps/1604.05587">ps</a>, <a href="https://arxiv.org/format/1604.05587">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="Nuclear Experiment">nucl-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/s10052-016-4279-2">10.1140/epjc/s10052-016-4279-2 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Assessment of backgrounds of the ANAIS experiment for dark matter direct detection </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Amare%2C+J">J. Amare</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/nucl-ex?searchtype=author&query=Cuesta%2C+C">C. Cuesta</a>, <a href="/search/nucl-ex?searchtype=author&query=Garcia%2C+E">E. Garcia</a>, <a href="/search/nucl-ex?searchtype=author&query=Martinez%2C+M">M. Martinez</a>, <a href="/search/nucl-ex?searchtype=author&query=Olivan%2C+M+A">M. A. Olivan</a>, <a href="/search/nucl-ex?searchtype=author&query=Ortigoza%2C+Y">Y. Ortigoza</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Solorzano%2C+A+O">A. Ortiz de Solorzano</a>, <a href="/search/nucl-ex?searchtype=author&query=Puimedon%2C+J">J. Puimedon</a>, <a href="/search/nucl-ex?searchtype=author&query=Sarsa%2C+M+L">M. L. Sarsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+J+A">J. A. Villar</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+P">P. Villar</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="1604.05587v3-abstract-short" style="display: inline;"> A large effort has been carried out to characterize the background of sodium iodide crystals within the ANAIS (Annual modulation with NaI Scintillators) project. In this paper, the background models developed for three 12.5-kg NaI(Tl) scintillators produced by Alpha Spectra Inc. and operated at the Canfranc Underground Laboratory are presented together with an evaluation of the background prospect… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.05587v3-abstract-full').style.display = 'inline'; document.getElementById('1604.05587v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1604.05587v3-abstract-full" style="display: none;"> A large effort has been carried out to characterize the background of sodium iodide crystals within the ANAIS (Annual modulation with NaI Scintillators) project. In this paper, the background models developed for three 12.5-kg NaI(Tl) scintillators produced by Alpha Spectra Inc. and operated at the Canfranc Underground Laboratory are presented together with an evaluation of the background prospects for the full experiment. Measured spectra from threshold to high energy in different conditions are well described by the models based on quantified activities. At the region of interest, crystal bulk contamination is the dominant background source. Contributions from 210Pb, 40K, 22Na and 3H are the most relevant. Those from 40K and 22Na could be efficiently suppressed thanks to anticoincidence operation in a crystals matrix or inside a Liquid Scintillator Veto (LSV), while that from 210Pb has been reduced by improving crystal production methods and 3H production could be reduced by shielding against cosmic rays during production. Assuming the activities of the last characterized detector, for nine crystals with a total mass of 112.5 kg the expected background rate is 2.5 counts/(keV kg d) in the region from 1 to 4 keV, which could be reduced at 1.4 counts/(keV kg d) by using a LSV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.05587v3-abstract-full').style.display = 'none'; document.getElementById('1604.05587v3-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 July, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 April, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">Version as accepted for publication in Eur. Phys. J. C</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1511.09246">arXiv:1511.09246</a> <span> [<a href="https://arxiv.org/pdf/1511.09246">pdf</a>, <a href="https://arxiv.org/format/1511.09246">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> <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/10.1007/JHEP05(2016)159">10.1007/JHEP05(2016)159 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Sensitivity of NEXT-100 to neutrinoless double beta decay </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Mart%C3%ADn-Albo%2C+J">J. Mart铆n-Albo</a>, <a href="/search/nucl-ex?searchtype=author&query=Vidal%2C+J+M">J. Mu帽oz Vidal</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Nebot-Guinot%2C+M">M. Nebot-Guinot</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G">F. I. G. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/nucl-ex?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Guti%C3%A9rrez%2C+R+M">R. M. Guti茅rrez</a>, <a href="/search/nucl-ex?searchtype=author&query=Hauptman%2C+J">J. Hauptman</a>, <a href="/search/nucl-ex?searchtype=author&query=Henriques%2C+C+A+O">C. A. O. Henriques</a>, <a href="/search/nucl-ex?searchtype=author&query=Morata%2C+J+A+H">J. A. Hernando Morata</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="1511.09246v2-abstract-short" style="display: inline;"> NEXT-100 is an electroluminescent high-pressure xenon gas time projection chamber that will search for the neutrinoless double beta ($尾尾0 谓$) decay of Xe-136. The detector possesses two features of great value for $尾尾0 谓$ searches: energy resolution better than 1\% FWHM at the $Q$ value of Xe-136 and track reconstruction for the discrimination of signal and background events. This combination resu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1511.09246v2-abstract-full').style.display = 'inline'; document.getElementById('1511.09246v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1511.09246v2-abstract-full" style="display: none;"> NEXT-100 is an electroluminescent high-pressure xenon gas time projection chamber that will search for the neutrinoless double beta ($尾尾0 谓$) decay of Xe-136. The detector possesses two features of great value for $尾尾0 谓$ searches: energy resolution better than 1\% FWHM at the $Q$ value of Xe-136 and track reconstruction for the discrimination of signal and background events. This combination results in excellent sensitivity, as discussed in this paper. Material-screening measurements and a detailed Monte Carlo detector simulation predict a background rate for NEXT-100 of at most $4\times10^{-4}$ counts keV$^{-1}$ kg$^{-1}$ yr$^{-1}$. Accordingly, the detector will reach a sensitivity to the \bbonu-decay half-life of $2.8\times10^{25}$ years (90\% CL) for an exposure of 100 $\mathrm{kg}\cdot\mathrm{year}$, or $6.0\times10^{25}$ years after a run of 3 effective years. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1511.09246v2-abstract-full').style.display = 'none'; document.getElementById('1511.09246v2-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> 31 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 November, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">Accepted for publication in the Journal of High Energy Physics (JHEP)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 1605 (2016) 159 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1508.06152">arXiv:1508.06152</a> <span> [<a href="https://arxiv.org/pdf/1508.06152">pdf</a>, <a href="https://arxiv.org/format/1508.06152">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="Astrophysics of Galaxies">astro-ph.GA</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> <p class="title is-5 mathjax"> Light Collection in the Prototypes of the ANAIS Dark Matter Project </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Amar%C3%A9%2C+J">Julio Amar茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">Susana Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cuesta%2C+C">Clara Cuesta</a>, <a href="/search/nucl-ex?searchtype=author&query=Garc%C3%ADa%2C+E">Eduardo Garc铆a</a>, <a href="/search/nucl-ex?searchtype=author&query=Mart%C3%ADnez%2C+M">Mar铆a Mart铆nez</a>, <a href="/search/nucl-ex?searchtype=author&query=Oliv%C3%A1n%2C+M+A">Miguel A. Oliv谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Ortigoza%2C+Y">Ysrael Ortigoza</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Sol%C3%B3rzano%2C+A+O">Alfonso Ort铆z de Sol贸rzano</a>, <a href="/search/nucl-ex?searchtype=author&query=Pobes%2C+C">Carlos Pobes</a>, <a href="/search/nucl-ex?searchtype=author&query=Puimed%C3%B3n%2C+J">Jorge Puimed贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Sarsa%2C+M+L">Mar铆a Luisa Sarsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+J+%C3%81">Jos茅脕ngel Villar</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+P">Patricia Villar</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="1508.06152v1-abstract-short" style="display: inline;"> The ANAIS experiment aims at the confirmation of the DAMA/LIBRA signal using the same target and technique at the Canfranc Underground Laboratory (LSC) in Spain. ANAIS detectors consist of large NaI crystals coupled to two photomultipliers (PMTs). In this work we present Single Electron Response (SER) data for several units of the Hamamatsu R12669SEL2 PMT model extracted from normal operation data… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.06152v1-abstract-full').style.display = 'inline'; document.getElementById('1508.06152v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1508.06152v1-abstract-full" style="display: none;"> The ANAIS experiment aims at the confirmation of the DAMA/LIBRA signal using the same target and technique at the Canfranc Underground Laboratory (LSC) in Spain. ANAIS detectors consist of large NaI crystals coupled to two photomultipliers (PMTs). In this work we present Single Electron Response (SER) data for several units of the Hamamatsu R12669SEL2 PMT model extracted from normal operation data of ANAIS underground prototypes and we compare them with PMT SER characterization previously done at surface lab before coupling them to NaI crystal. Moreover, total light collection for different ANAIS prototypes has been calculated, producing an excellent average result of 15 phe/keV, which has a good impact in both energy resolution and threshold. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.06152v1-abstract-full').style.display = 'none'; document.getElementById('1508.06152v1-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 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">Contributed to the 11th Patras Workshop on Axions, WIMPs and WISPs, Zaragoza, June 22 to 26, 2015</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1505.07052">arXiv:1505.07052</a> <span> [<a href="https://arxiv.org/pdf/1505.07052">pdf</a>, <a href="https://arxiv.org/ps/1505.07052">ps</a>, <a href="https://arxiv.org/format/1505.07052">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> <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/10.1063/1.4927990">10.1063/1.4927990 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Radon and material radiopurity assessment for the NEXT double beta decay experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=P%C3%A9rez%2C+J">J. P茅rez</a>, <a href="/search/nucl-ex?searchtype=author&query=Bandac%2C+I">I. Bandac</a>, <a href="/search/nucl-ex?searchtype=author&query=Labarga%2C+L">L. Labarga</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Barrado%2C+A+I">A. I. Barrado</a>, <a href="/search/nucl-ex?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Camargo%2C+M">M. Camargo</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+E">E. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Fern%C3%A1ndez%2C+M">M. Fern谩ndez</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a>, <a href="/search/nucl-ex?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a> , et al. (46 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="1505.07052v1-abstract-short" style="display: inline;"> The Neutrino Experiment with a Xenon TPC (NEXT), intended to investigate the neutrinoless double beta decay using a high-pressure xenon gas TPC filled with Xe enriched in 136Xe at the Canfranc Underground Laboratory in Spain, requires ultra-low background conditions demanding an exhaustive control of material radiopurity and environmental radon levels. An extensive material screening process is un… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1505.07052v1-abstract-full').style.display = 'inline'; document.getElementById('1505.07052v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1505.07052v1-abstract-full" style="display: none;"> The Neutrino Experiment with a Xenon TPC (NEXT), intended to investigate the neutrinoless double beta decay using a high-pressure xenon gas TPC filled with Xe enriched in 136Xe at the Canfranc Underground Laboratory in Spain, requires ultra-low background conditions demanding an exhaustive control of material radiopurity and environmental radon levels. An extensive material screening process is underway for several years based mainly on gamma-ray spectroscopy using ultra-low background germanium detectors in Canfranc but also on mass spectrometry techniques like GDMS and ICPMS. Components from shielding, pressure vessel, electroluminescence and high voltage elements and energy and tracking readout planes have been analyzed, helping in the final design of the experiment and in the construction of the background model. The latest measurements carried out will be presented and the implication on NEXT of their results will be discussed. The commissioning of the NEW detector, as a first step towards NEXT, has started in Canfranc; in-situ measurements of airborne radon levels were taken there to optimize the system for radon mitigation and will be shown too. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1505.07052v1-abstract-full').style.display = 'none'; document.getElementById('1505.07052v1-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 May, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">Proceedings of the Low Radioactivity Techniques 2015 workshop (LRT2015), Seattle, March 2015</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> AIP Conf. Proc. 1672, 010001 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1505.06102">arXiv:1505.06102</a> <span> [<a href="https://arxiv.org/pdf/1505.06102">pdf</a>, <a href="https://arxiv.org/ps/1505.06102">ps</a>, <a href="https://arxiv.org/format/1505.06102">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> <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/10.1063/1.4928017">10.1063/1.4928017 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Production and relevance of cosmogenic radionuclides in NaI(Tl) crystals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Amare%2C+J">J. Amare</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/nucl-ex?searchtype=author&query=Cuesta%2C+C">C. Cuesta</a>, <a href="/search/nucl-ex?searchtype=author&query=Garcia%2C+E">E. Garcia</a>, <a href="/search/nucl-ex?searchtype=author&query=Ginestra%2C+C">C. Ginestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Martinez%2C+M">M. Martinez</a>, <a href="/search/nucl-ex?searchtype=author&query=Olivan%2C+M+A">M. A. Olivan</a>, <a href="/search/nucl-ex?searchtype=author&query=Ortigoza%2C+Y">Y. Ortigoza</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Solorzano%2C+A+O">A. Ortiz de Solorzano</a>, <a href="/search/nucl-ex?searchtype=author&query=Pobes%2C+C">C. Pobes</a>, <a href="/search/nucl-ex?searchtype=author&query=Puimedon%2C+J">J. Puimedon</a>, <a href="/search/nucl-ex?searchtype=author&query=Sarsa%2C+M+L">M. L. Sarsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+J+A">J. A. Villar</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+P">P. Villar</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="1505.06102v1-abstract-short" style="display: inline;"> The cosmogenic production of long-lived radioactive isotopes in materials is an hazard for experiments demanding ultra-low background conditions. Although NaI(Tl) scintillators have been used in this context for a long time, very few activation data were available. We present results from two 12.5 kg NaI(Tl) detectors, developed within the ANAIS project and installed at the Canfranc Underground La… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1505.06102v1-abstract-full').style.display = 'inline'; document.getElementById('1505.06102v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1505.06102v1-abstract-full" style="display: none;"> The cosmogenic production of long-lived radioactive isotopes in materials is an hazard for experiments demanding ultra-low background conditions. Although NaI(Tl) scintillators have been used in this context for a long time, very few activation data were available. We present results from two 12.5 kg NaI(Tl) detectors, developed within the ANAIS project and installed at the Canfranc Underground Laboratory. The prompt data taking starting made possible a reliable quantification of production of some I, Te and Na isotopes with half-lives larger than ten days. Initial activities underground were measured and then production rates at sea level were estimated following the history of detectors; a comparison of these rates with calculations using typical cosmic neutron flux at sea level and a selected description of excitation functions was also carried out. After including the contribution from the identified cosmogenic products in the detector background model, we found that the presence of 3H in the crystal bulk would help to fit much better our background model and experimental data. We have analyzed the cosmogenic production of 3H in NaI, and although precise quantification has not been attempted, we can conclude that it could imply a very relevant contribution to the total background below 15 keV in NaI detectors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1505.06102v1-abstract-full').style.display = 'none'; document.getElementById('1505.06102v1-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 May, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">Proceedings of the Low Radioactivity Techniques 2015 workshop, March 2015, Seattle (US)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> AIP Conf. Proc. 1672, 140001 (2015); </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1411.1433">arXiv:1411.1433</a> <span> [<a href="https://arxiv.org/pdf/1411.1433">pdf</a>, <a href="https://arxiv.org/ps/1411.1433">ps</a>, <a href="https://arxiv.org/format/1411.1433">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> <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/10.1088/1748-0221/10/05/P05006">10.1088/1748-0221/10/05/P05006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Radiopurity assessment of the tracking readout for the NEXT double beta decay experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=P%C3%A9rez%2C+J">J. P茅rez</a>, <a href="/search/nucl-ex?searchtype=author&query=Bandac%2C+I">I. Bandac</a>, <a href="/search/nucl-ex?searchtype=author&query=Labarga%2C+L">L. Labarga</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Barrado%2C+A+I">A. I. Barrado</a>, <a href="/search/nucl-ex?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Camargo%2C+M">M. Camargo</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+E">E. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Fern%C3%A1ndez%2C+M">M. Fern谩ndez</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a>, <a href="/search/nucl-ex?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a> , et al. (46 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="1411.1433v2-abstract-short" style="display: inline;"> The Neutrino Experiment with a Xenon Time-Projection Chamber (NEXT) is intended to investigate the neutrinoless double beta decay of 136Xe, which requires a severe suppression of potential backgrounds; therefore, an extensive screening and selection process is underway to control the radiopurity levels of the materials to be used in the experimental set-up of NEXT. The detector design combines the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.1433v2-abstract-full').style.display = 'inline'; document.getElementById('1411.1433v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1411.1433v2-abstract-full" style="display: none;"> The Neutrino Experiment with a Xenon Time-Projection Chamber (NEXT) is intended to investigate the neutrinoless double beta decay of 136Xe, which requires a severe suppression of potential backgrounds; therefore, an extensive screening and selection process is underway to control the radiopurity levels of the materials to be used in the experimental set-up of NEXT. The detector design combines the measurement of the topological signature of the event for background discrimination with the energy resolution optimization. Separate energy and tracking readout planes are based on different sensors: photomultiplier tubes for calorimetry and silicon multi-pixel photon counters for tracking. The design of a radiopure tracking plane, in direct contact with the gas detector medium, was specially challenging since the needed components like printed circuit boards, connectors, sensors or capacitors have typically, according to available information in databases and in the literature, activities too large for experiments requiring ultra-low background conditions. Here, the radiopurity assessment of tracking readout components based on gamma-ray spectroscopy using ultra-low background germanium detectors at the Laboratorio Subterraneo de Canfranc (Spain) is described. According to the obtained results, radiopure enough printed circuit boards made of kapton and copper, silicon photomultipliers and other required components, fulfilling the requirement of an overall background level in the region of interest of at most 8 10-4 counts keV-1 kg-1 y-1, have been identified. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.1433v2-abstract-full').style.display = 'none'; document.getElementById('1411.1433v2-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 June, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 November, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2015 JINST 10 P05006 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1411.1222">arXiv:1411.1222</a> <span> [<a href="https://arxiv.org/pdf/1411.1222">pdf</a>, <a href="https://arxiv.org/format/1411.1222">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Results of the material screening program of the NEXT experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/nucl-ex?searchtype=author&query=Alvarez%2C+V">V. Alvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Bandac%2C+I">I. Bandac</a>, <a href="/search/nucl-ex?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Camargo%2C+M">M. Camargo</a>, <a href="/search/nucl-ex?searchtype=author&query=Carcel%2C+S">S. Carcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/nucl-ex?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Diaz%2C+J">J. Diaz</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandez%2C+M">M. Fernandez</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a>, <a href="/search/nucl-ex?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/nucl-ex?searchtype=author&query=Gomez%2C+H">H. Gomez</a>, <a href="/search/nucl-ex?searchtype=author&query=Gomez-Cadenas%2C+J+J">J. J. Gomez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonzalez-Diaz%2C+D">D. Gonzalez-Diaz</a>, <a href="/search/nucl-ex?searchtype=author&query=Gutierrez%2C+R+M">R. M. Gutierrez</a>, <a href="/search/nucl-ex?searchtype=author&query=Hauptman%2C+J">J. Hauptman</a>, <a href="/search/nucl-ex?searchtype=author&query=Morata%2C+J+A+H">J. A. Hernando Morata</a> , et al. (45 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="1411.1222v1-abstract-short" style="display: inline;"> The 'Neutrino Experiment with a Xenon TPC (NEXT)', intended to investigate neutrinoless double beta decay, requires extremely low background levels. An extensive material screening and selection process to assess the radioactivity of components is underway combining several techniques, including germanium gamma-ray spectrometry performed at the Canfranc Underground Laboratory; recent results of th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.1222v1-abstract-full').style.display = 'inline'; document.getElementById('1411.1222v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1411.1222v1-abstract-full" style="display: none;"> The 'Neutrino Experiment with a Xenon TPC (NEXT)', intended to investigate neutrinoless double beta decay, requires extremely low background levels. An extensive material screening and selection process to assess the radioactivity of components is underway combining several techniques, including germanium gamma-ray spectrometry performed at the Canfranc Underground Laboratory; recent results of this material screening program are presented here. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.1222v1-abstract-full').style.display = 'none'; document.getElementById('1411.1222v1-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> 5 November, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2014. </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">Proceedings for a poster contribution at ICHEP 2014, Valencia, Spain</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1411.0106">arXiv:1411.0106</a> <span> [<a href="https://arxiv.org/pdf/1411.0106">pdf</a>, <a href="https://arxiv.org/ps/1411.0106">ps</a>, <a href="https://arxiv.org/format/1411.0106">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="Astrophysics of Galaxies">astro-ph.GA</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/10.1088/1475-7516/2015/02/046">10.1088/1475-7516/2015/02/046 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Cosmogenic radionuclide production in NaI(Tl) crystals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Amar%C3%A9%2C+J">J. Amar茅</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cuesta%2C+C">C. Cuesta</a>, <a href="/search/nucl-ex?searchtype=author&query=Garc%C3%ADa%2C+E">E. Garc铆a</a>, <a href="/search/nucl-ex?searchtype=author&query=Ginestra%2C+C">C. Ginestra</a>, <a href="/search/nucl-ex?searchtype=author&query=Mart%C3%ADnez%2C+M">M. Mart铆nez</a>, <a href="/search/nucl-ex?searchtype=author&query=Oliv%C3%A1n%2C+M+A">M. A. Oliv谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Ortigoza%2C+Y">Y. Ortigoza</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Sol%C3%B3rzano%2C+A+O">A. Ortiz de Sol贸rzano</a>, <a href="/search/nucl-ex?searchtype=author&query=Pobes%2C+C">C. Pobes</a>, <a href="/search/nucl-ex?searchtype=author&query=Puimed%C3%B3n%2C+J">J. Puimed贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=Sarsa%2C+M+L">M. L. Sarsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+J+A">J. A. Villar</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+P">P. Villar</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="1411.0106v2-abstract-short" style="display: inline;"> The production of long-lived radioactive isotopes in materials due to the exposure to cosmic rays on Earth surface can be an hazard for experiments demanding ultra-low background conditions, typically performed deep underground. Production rates of cosmogenic isotopes in all the materials present in the experimental set-up, as well as the corresponding cosmic rays exposure history, must be both we… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.0106v2-abstract-full').style.display = 'inline'; document.getElementById('1411.0106v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1411.0106v2-abstract-full" style="display: none;"> The production of long-lived radioactive isotopes in materials due to the exposure to cosmic rays on Earth surface can be an hazard for experiments demanding ultra-low background conditions, typically performed deep underground. Production rates of cosmogenic isotopes in all the materials present in the experimental set-up, as well as the corresponding cosmic rays exposure history, must be both well known in order to assess the relevance of this effect in the achievable sensitivity of a given experiment. Although NaI(Tl) scintillators are being used in experiments aiming at the direct detection of dark matter since the first nineties of the last century, very few data about cosmogenic isotopes production rates have been published up to date. In this work we present data from two 12.5 kg NaI(Tl) detectors, developed in the frame of the ANAIS project, which were installed inside a convenient shielding at the Canfranc Underground Laboratory just after finishing surface exposure to cosmic rays. The very fast start of data taking allowed to identify and quantify isotopes with half-lives of the order of tens of days. Initial activities underground have been measured and then production rates at sea level have been estimated following the history of detectors; values of about a few tens of nuclei per kg and day for Te isotopes and 22Na and of a few hundreds for I isotopes have been found. These are the first direct estimates of production rates of cosmogenic nuclides in NaI crystals. A comparison of the so deduced rates with calculations using typical cosmic neutron flux at sea level and a carefully selected description of excitation functions will be also presented together with an estimate of the corresponding contribution to the background at low and high energies, which can be relevant for experiments aiming at rare events searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.0106v2-abstract-full').style.display = 'none'; document.getElementById('1411.0106v2-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 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 November, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2014. </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">Accepted for publication at JCAP</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1409.2853">arXiv:1409.2853</a> <span> [<a href="https://arxiv.org/pdf/1409.2853">pdf</a>, <a href="https://arxiv.org/format/1409.2853">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> <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.2015.04.057">10.1016/j.nima.2015.04.057 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ionization and scintillation of nuclear recoils in gaseous xenon </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Renner%2C+J">J. Renner</a>, <a href="/search/nucl-ex?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a>, <a href="/search/nucl-ex?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/nucl-ex?searchtype=author&query=Matis%2C+H+S">H. S. Matis</a>, <a href="/search/nucl-ex?searchtype=author&query=Miller%2C+T">T. Miller</a>, <a href="/search/nucl-ex?searchtype=author&query=Nakajima%2C+Y">Y. Nakajima</a>, <a href="/search/nucl-ex?searchtype=author&query=Nygren%2C+D">D. Nygren</a>, <a href="/search/nucl-ex?searchtype=author&query=Oliveira%2C+C+A+B">C. A. B. Oliveira</a>, <a href="/search/nucl-ex?searchtype=author&query=Shuman%2C+D">D. Shuman</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G">F. I. G. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/nucl-ex?searchtype=author&query=Dias%2C+T+H+V+T">T. H. V. T. Dias</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Evtoukhovitch%2C+P">P. Evtoukhovitch</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a> , et al. (53 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="1409.2853v1-abstract-short" style="display: inline;"> Ionization and scintillation produced by nuclear recoils in gaseous xenon at approximately 14 bar have been simultaneously observed in an electroluminescent time projection chamber. Neutrons from radioisotope $伪$-Be neutron sources were used to induce xenon nuclear recoils, and the observed recoil spectra were compared to a detailed Monte Carlo employing estimated ionization and scintillation yiel… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.2853v1-abstract-full').style.display = 'inline'; document.getElementById('1409.2853v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1409.2853v1-abstract-full" style="display: none;"> Ionization and scintillation produced by nuclear recoils in gaseous xenon at approximately 14 bar have been simultaneously observed in an electroluminescent time projection chamber. Neutrons from radioisotope $伪$-Be neutron sources were used to induce xenon nuclear recoils, and the observed recoil spectra were compared to a detailed Monte Carlo employing estimated ionization and scintillation yields for nuclear recoils. The ability to discriminate between electronic and nuclear recoils using the ratio of ionization to primary scintillation is demonstrated. These results encourage further investigation on the use of xenon in the gas phase as a detector medium in dark matter direct detection experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.2853v1-abstract-full').style.display = 'none'; document.getElementById('1409.2853v1-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, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2014. </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, 14 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nuclear Instruments and Methods A 793, 62 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1306.3067">arXiv:1306.3067</a> <span> [<a href="https://arxiv.org/pdf/1306.3067">pdf</a>, <a href="https://arxiv.org/ps/1306.3067">ps</a>, <a href="https://arxiv.org/format/1306.3067">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> <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/10.1088/0954-3899/40/12/125203">10.1088/0954-3899/40/12/125203 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pattern recognition of $^{136}$Xe double beta decay events and background discrimination in a high pressure Xenon TPC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Cebrian%2C+S">S Cebrian</a>, <a href="/search/nucl-ex?searchtype=author&query=Dafni%2C+T">T Dafni</a>, <a href="/search/nucl-ex?searchtype=author&query=Gomez%2C+H">H Gomez</a>, <a href="/search/nucl-ex?searchtype=author&query=Herrera%2C+D+C">D C Herrera</a>, <a href="/search/nucl-ex?searchtype=author&query=Iguaz%2C+F+J">F J Iguaz</a>, <a href="/search/nucl-ex?searchtype=author&query=Irastorza%2C+I+G">I G Irastorza</a>, <a href="/search/nucl-ex?searchtype=author&query=Luzon%2C+G">G Luzon</a>, <a href="/search/nucl-ex?searchtype=author&query=Segui%2C+L">L Segui</a>, <a href="/search/nucl-ex?searchtype=author&query=Tomas%2C+A">A Tomas</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="1306.3067v2-abstract-short" style="display: inline;"> High pressure gas detectors offer advantages for the detection of rare events, where background reduction is crucial. For the neutrinoless double beta decay of 136Xe a high pressure xenon gas Time Projection Chamber (TPC) combines a good energy resolution and a detailed topological information of each event. The ionization topology of the double beta decay event of 136Xe in gaseous xenon has a cha… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1306.3067v2-abstract-full').style.display = 'inline'; document.getElementById('1306.3067v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1306.3067v2-abstract-full" style="display: none;"> High pressure gas detectors offer advantages for the detection of rare events, where background reduction is crucial. For the neutrinoless double beta decay of 136Xe a high pressure xenon gas Time Projection Chamber (TPC) combines a good energy resolution and a detailed topological information of each event. The ionization topology of the double beta decay event of 136Xe in gaseous xenon has a characteristic shape defined by the two straggling electron tracks ending up in two higher ionization charge density blobs. With a properly pixelized readout, this topological information is invaluable to perform powerful background discrimination. In this study we carry out detailed simulations of the signal topology, as well as the competing topologies from gamma events that typically compose the background at these energies. We define observables based on graph theory concepts and develop automated discrimination algorithms which reduce the background level in around three orders of magnitude while keeping signal efficiency of 40%. This result supports the competitiveness of current or future double beta experiments based on gas TPCs, like the Neutrino Xenon TPC (NEXT) currently under construction in the Laboratorio Subterraneo de Canfranc (LSC). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1306.3067v2-abstract-full').style.display = 'none'; document.getElementById('1306.3067v2-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> 17 October, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 June, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2013. </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">26 pages, 9 figures, accepted for publication in Journal of Physics G</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1211.4508">arXiv:1211.4508</a> <span> [<a href="https://arxiv.org/pdf/1211.4508">pdf</a>, <a href="https://arxiv.org/format/1211.4508">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="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/10.1088/1748-0221/8/05/P05025">10.1088/1748-0221/8/05/P05025 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ionization and scintillation response of high-pressure xenon gas to alpha particles </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Egorov%2C+M">M. Egorov</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Evtoukhovitch%2C+P">P. Evtoukhovitch</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a>, <a href="/search/nucl-ex?searchtype=author&query=Gil%2C+A">A. Gil</a>, <a href="/search/nucl-ex?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez%2C+H">H. G贸mez</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Guti%C3%A9rrez%2C+R+M">R. M. Guti茅rrez</a>, <a href="/search/nucl-ex?searchtype=author&query=Hauptman%2C+J">J. Hauptman</a>, <a href="/search/nucl-ex?searchtype=author&query=Morata%2C+J+A+H">J. A. Hernando Morata</a> , et al. (48 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="1211.4508v3-abstract-short" style="display: inline;"> High-pressure xenon gas is an attractive detection medium for a variety of applications in fundamental and applied physics. In this paper we study the ionization and scintillation detection properties of xenon gas at 10 bar pressure. For this purpose, we use a source of alpha particles in the NEXT-DEMO time projection chamber, the large scale prototype of the NEXT-100 neutrinoless double beta deca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.4508v3-abstract-full').style.display = 'inline'; document.getElementById('1211.4508v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.4508v3-abstract-full" style="display: none;"> High-pressure xenon gas is an attractive detection medium for a variety of applications in fundamental and applied physics. In this paper we study the ionization and scintillation detection properties of xenon gas at 10 bar pressure. For this purpose, we use a source of alpha particles in the NEXT-DEMO time projection chamber, the large scale prototype of the NEXT-100 neutrinoless double beta decay experiment, in three different drift electric field configurations. We measure the ionization electron drift velocity and longitudinal diffusion, and compare our results to expectations based on available electron scattering cross sections on pure xenon. In addition, two types of measurements addressing the connection between the ionization and scintillation yields are performed. On the one hand we observe, for the first time in xenon gas, large event-by-event correlated fluctuations between the ionization and scintillation signals, similar to that already observed in liquid xenon. On the other hand, we study the field dependence of the average scintillation and ionization yields. Both types of measurements may shed light on the mechanism of electron-ion recombination in xenon gas for highly-ionizing particles. Finally, by comparing the response of alpha particles and electrons in NEXT-DEMO, we find no evidence for quenching of the primary scintillation light produced by alpha particles in the xenon gas. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.4508v3-abstract-full').style.display = 'none'; document.getElementById('1211.4508v3-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 May, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2012. </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">36 pages, 19 figures, 5 tables. Version accepted for publication in JINST</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1211.4474">arXiv:1211.4474</a> <span> [<a href="https://arxiv.org/pdf/1211.4474">pdf</a>, <a href="https://arxiv.org/format/1211.4474">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Near-Intrinsic Energy Resolution for 30 to 662 keV Gamma Rays in a High Pressure Xenon Electroluminescent TPC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/nucl-ex?searchtype=author&query=Dias%2C+T+H+V+T">T. H. V. T. Dias</a>, <a href="/search/nucl-ex?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Egorov%2C+M">M. Egorov</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Evtoukhovitch%2C+P">P. Evtoukhovitch</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a>, <a href="/search/nucl-ex?searchtype=author&query=Gil%2C+A">A. Gil</a>, <a href="/search/nucl-ex?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez%2C+H">H. G贸mez</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a>, <a href="/search/nucl-ex?searchtype=author&query=Guti%C3%A9rrez%2C+R+M">R. M. Guti茅rrez</a> , et al. (53 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="1211.4474v1-abstract-short" style="display: inline;"> We present the design, data and results from the NEXT prototype for Double Beta and Dark Matter (NEXT-DBDM) detector, a high-pressure gaseous natural xenon electroluminescent time projection chamber (TPC) that was built at the Lawrence Berkeley National Laboratory. It is a prototype of the planned NEXT-100 $^{136}$Xe neutrino-less double beta decay ($0谓尾尾$) experiment with the main objectives of d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.4474v1-abstract-full').style.display = 'inline'; document.getElementById('1211.4474v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.4474v1-abstract-full" style="display: none;"> We present the design, data and results from the NEXT prototype for Double Beta and Dark Matter (NEXT-DBDM) detector, a high-pressure gaseous natural xenon electroluminescent time projection chamber (TPC) that was built at the Lawrence Berkeley National Laboratory. It is a prototype of the planned NEXT-100 $^{136}$Xe neutrino-less double beta decay ($0谓尾尾$) experiment with the main objectives of demonstrating near-intrinsic energy resolution at energies up to 662 keV and of optimizing the NEXT-100 detector design and operating parameters. Energy resolutions of $\sim$1% FWHM for 662 keV gamma rays were obtained at 10 and 15 atm and $\sim$5% FWHM for 30 keV fluorescence xenon X-rays. These results demonstrate that 0.5% FWHM resolutions for the 2,459 keV hypothetical neutrino-less double beta decay peak are realizable. This energy resolution is a factor 7 to 20 better than that of the current leading $0谓尾尾$ experiments using liquid xenon and thus represents a significant advancement. We present also first results from a track imaging system consisting of 64 silicon photo-multipliers recently installed in NEXT-DBDM that, along with the excellent energy resolution, demonstrates the key functionalities required for the NEXT-100 $0谓尾尾$ search. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.4474v1-abstract-full').style.display = 'none'; document.getElementById('1211.4474v1-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 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2012. </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">51 pages, 26 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/1211.3961">arXiv:1211.3961</a> <span> [<a href="https://arxiv.org/pdf/1211.3961">pdf</a>, <a href="https://arxiv.org/ps/1211.3961">ps</a>, <a href="https://arxiv.org/format/1211.3961">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/10.1088/1748-0221/8/01/T01002">10.1088/1748-0221/8/01/T01002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Radiopurity control in the NEXT-100 double beta decay experiment: procedures and initial measurements </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Alvarez%2C+V">V. Alvarez</a>, <a href="/search/nucl-ex?searchtype=author&query=Bandac%2C+I">I. Bandac</a>, <a href="/search/nucl-ex?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Carcel%2C+S">S. Carcel</a>, <a href="/search/nucl-ex?searchtype=author&query=Castel%2C+J">J. Castel</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/nucl-ex?searchtype=author&query=Cervera%2C+A">A. Cervera</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/nucl-ex?searchtype=author&query=Dias%2C+T+H+V+T">T. H. V. T. Dias</a>, <a href="/search/nucl-ex?searchtype=author&query=Diaz%2C+J">J. Diaz</a>, <a href="/search/nucl-ex?searchtype=author&query=Egorov%2C+M">M. Egorov</a>, <a href="/search/nucl-ex?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/nucl-ex?searchtype=author&query=Evtoukhovitch%2C+P">P. Evtoukhovitch</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gehman%2C+V+M">V. M. Gehman</a>, <a href="/search/nucl-ex?searchtype=author&query=Gil%2C+A">A. Gil</a>, <a href="/search/nucl-ex?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a>, <a href="/search/nucl-ex?searchtype=author&query=Gomez%2C+H">H. Gomez</a>, <a href="/search/nucl-ex?searchtype=author&query=Gomez-Cadenas%2C+J+J">J. J. Gomez-Cadenas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonzalez-Diaz%2C+D">D. Gonzalez-Diaz</a> , et al. (55 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="1211.3961v3-abstract-short" style="display: inline;"> The Neutrino Experiment with a Xenon TPC (NEXT) is intended to investigate the neutrinoless double beta decay of 136Xe, which requires a severe suppression of potential backgrounds. An extensive screening and material selection process is underway for NEXT since the control of the radiopurity levels of the materials to be used in the experimental set-up is a must for rare event searches. First mea… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.3961v3-abstract-full').style.display = 'inline'; document.getElementById('1211.3961v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.3961v3-abstract-full" style="display: none;"> The Neutrino Experiment with a Xenon TPC (NEXT) is intended to investigate the neutrinoless double beta decay of 136Xe, which requires a severe suppression of potential backgrounds. An extensive screening and material selection process is underway for NEXT since the control of the radiopurity levels of the materials to be used in the experimental set-up is a must for rare event searches. First measurements based on Glow Discharge Mass Spectrometry and gamma-ray spectroscopy using ultra-low background germanium detectors at the Laboratorio Subterr谩neo de Canfranc (Spain) are described here. Activity results for natural radioactive chains and other common radionuclides are summarized, being the values obtained for some materials like copper and stainless steel very competitive. The implications of these results for the NEXT experiment are also discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.3961v3-abstract-full').style.display = 'none'; document.getElementById('1211.3961v3-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 January, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2012. </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">Final version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2013 JINST 8 T01002 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1010.4066">arXiv:1010.4066</a> <span> [<a href="https://arxiv.org/pdf/1010.4066">pdf</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"> Measurements of proton-induced radionuclide production cross sections to evaluate cosmic-ray activation of tellurium </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Barghouty%2C+A+F">A. F. Barghouty</a>, <a href="/search/nucl-ex?searchtype=author&query=Brofferio%2C+C">C. Brofferio</a>, <a href="/search/nucl-ex?searchtype=author&query=Capelli%2C+S">S. Capelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Clemenza%2C+M">M. Clemenza</a>, <a href="/search/nucl-ex?searchtype=author&query=Cremonesi%2C+O">O. Cremonesi</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Fiorini%2C+E">E. Fiorini</a>, <a href="/search/nucl-ex?searchtype=author&query=Haight%2C+R+C">R. C. Haight</a>, <a href="/search/nucl-ex?searchtype=author&query=Norman%2C+E+B">E. B. Norman</a>, <a href="/search/nucl-ex?searchtype=author&query=Previtali%2C+E">E. Previtali</a>, <a href="/search/nucl-ex?searchtype=author&query=Quiter%2C+B+J">B. J. Quiter</a>, <a href="/search/nucl-ex?searchtype=author&query=Sisti%2C+M">M. Sisti</a>, <a href="/search/nucl-ex?searchtype=author&query=Smith%2C+A+R">A. R. Smith</a>, <a href="/search/nucl-ex?searchtype=author&query=Wender%2C+S+A">S. A. Wender</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="1010.4066v2-abstract-short" style="display: inline;"> We have measured a large number of proton-induced radionuclide production cross sections from tellurium targets of natural isotopic composition at incident energies of 0.80, 1.4, and 23 GeV. The results of these measurements are compared to semi-empirical calculations. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1010.4066v2-abstract-full" style="display: none;"> We have measured a large number of proton-induced radionuclide production cross sections from tellurium targets of natural isotopic composition at incident energies of 0.80, 1.4, and 23 GeV. The results of these measurements are compared to semi-empirical calculations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1010.4066v2-abstract-full').style.display = 'none'; document.getElementById('1010.4066v2-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 December, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 October, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2010. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1005.2022">arXiv:1005.2022</a> <span> [<a href="https://arxiv.org/pdf/1005.2022">pdf</a>, <a href="https://arxiv.org/ps/1005.2022">ps</a>, <a href="https://arxiv.org/format/1005.2022">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.astropartphys.2010.09.003">10.1016/j.astropartphys.2010.09.003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Radiopurity of Micromegas readout planes </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Dafni%2C+T">T. Dafni</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferrer-Ribas%2C+E">E. Ferrer-Ribas</a>, <a href="/search/nucl-ex?searchtype=author&query=Gal%C3%A1n%2C+J">J. Gal谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez%2C+H">H. G贸mez</a>, <a href="/search/nucl-ex?searchtype=author&query=Iguaz%2C+F+J">F. J. Iguaz</a>, <a href="/search/nucl-ex?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/nucl-ex?searchtype=author&query=Luz%C3%B3n%2C+G">G. Luz贸n</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Oliveira%2C+R">R. de Oliveira</a>, <a href="/search/nucl-ex?searchtype=author&query=Rodr%C3%ADguez%2C+A">A. Rodr铆guez</a>, <a href="/search/nucl-ex?searchtype=author&query=Segu%C3%AD%2C+L">L. Segu铆</a>, <a href="/search/nucl-ex?searchtype=author&query=Tom%C3%A1s%2C+A">A. Tom谩s</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+J+A">J. A. Villar</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="1005.2022v2-abstract-short" style="display: inline;"> Micromesh Gas Amplification Structures (Micromegas) are being used in an increasing number of Particle Physics applications since their conception fourteen years ago. More recently, they are being used or considered as readout of Time Projection Chambers (TPCs) in the field of Rare Event searches (dealing with dark matter, axions or double beta decay). In these experiments, the radiopurity of the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1005.2022v2-abstract-full').style.display = 'inline'; document.getElementById('1005.2022v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1005.2022v2-abstract-full" style="display: none;"> Micromesh Gas Amplification Structures (Micromegas) are being used in an increasing number of Particle Physics applications since their conception fourteen years ago. More recently, they are being used or considered as readout of Time Projection Chambers (TPCs) in the field of Rare Event searches (dealing with dark matter, axions or double beta decay). In these experiments, the radiopurity of the detector components and surrounding materials is measured and finely controlled in order to keep the experimental background as low as possible. In the present paper, the first measurement of the radiopurity of Micromegas planes obtained by high purity germanium spectrometry in the low background facilities of the Canfranc Underground Laboratory (LSC) is presented. The obtained results prove that Micromegas readouts of the microbulk type are currently manufactured with radiopurity levels below 30 microBq/cm2 for Th and U chains and ~60 microBq/cm2 for 40K, already comparable to the cleanest detector components of the most stringent low background experiments at present. Taking into account that the studied readouts were manufactured without any specific control of the radiopurity, it should be possible to improve these levels after dedicated development. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1005.2022v2-abstract-full').style.display = 'none'; document.getElementById('1005.2022v2-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 August, 2010; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 May, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2010. </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, 2 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Astropart.Phys.34:354-359,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0907.4054">arXiv:0907.4054</a> <span> [<a href="https://arxiv.org/pdf/0907.4054">pdf</a>, <a href="https://arxiv.org/format/0907.4054">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> <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"> NEXT, a HPGXe TPC for neutrinoless double beta decay searches </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=The+NEXT+Collaboration"> The NEXT Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Granena%2C+F">F. Granena</a>, <a href="/search/nucl-ex?searchtype=author&query=Lux%2C+T">T. Lux</a>, <a href="/search/nucl-ex?searchtype=author&query=Nova%2C+F">F. Nova</a>, <a href="/search/nucl-ex?searchtype=author&query=Rico%2C+J">J. Rico</a>, <a href="/search/nucl-ex?searchtype=author&query=Sanchez%2C+F">F. Sanchez</a>, <a href="/search/nucl-ex?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/nucl-ex?searchtype=author&query=Barata%2C+J+A+S">J. A. S. Barata</a>, <a href="/search/nucl-ex?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/nucl-ex?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/nucl-ex?searchtype=author&query=Dias%2C+T+H+V+T">T. H. V. T. Dias</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/nucl-ex?searchtype=author&query=Lopes%2C+J+A+M">J. A. M. Lopes</a>, <a href="/search/nucl-ex?searchtype=author&query=Monteiro%2C+C+M+B">C. M. B. Monteiro</a>, <a href="/search/nucl-ex?searchtype=author&query=Santos%2C+J+M+F+d">J. M. F. dos Santos</a>, <a href="/search/nucl-ex?searchtype=author&query=Santos%2C+F+P">F. P. Santos</a>, <a href="/search/nucl-ex?searchtype=author&query=Tavora%2C+L+M+N">L. M. N. Tavora</a>, <a href="/search/nucl-ex?searchtype=author&query=Veloso%2C+J+F+C+A">J. F. C. A. Veloso</a>, <a href="/search/nucl-ex?searchtype=author&query=Calvo%2C+E">E. Calvo</a>, <a href="/search/nucl-ex?searchtype=author&query=Gil-Botella%2C+I">I. Gil-Botella</a>, <a href="/search/nucl-ex?searchtype=author&query=Novella%2C+P">P. Novella</a>, <a href="/search/nucl-ex?searchtype=author&query=Palomares%2C+C">C. Palomares</a>, <a href="/search/nucl-ex?searchtype=author&query=Verdugo%2C+A">A. Verdugo</a>, <a href="/search/nucl-ex?searchtype=author&query=Giomataris%2C+I">I. Giomataris</a> , et al. (39 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="0907.4054v1-abstract-short" style="display: inline;"> We propose a novel detection concept for neutrinoless double-beta decay searches. This concept is based on a Time Projection Chamber (TPC) filled with high-pressure gaseous xenon, and with separated-function capabilities for calorimetry and tracking. Thanks to its excellent energy resolution, together with its powerful background rejection provided by the distinct double-beta decay topological s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0907.4054v1-abstract-full').style.display = 'inline'; document.getElementById('0907.4054v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0907.4054v1-abstract-full" style="display: none;"> We propose a novel detection concept for neutrinoless double-beta decay searches. This concept is based on a Time Projection Chamber (TPC) filled with high-pressure gaseous xenon, and with separated-function capabilities for calorimetry and tracking. Thanks to its excellent energy resolution, together with its powerful background rejection provided by the distinct double-beta decay topological signature, the design discussed in this Letter Of Intent promises to be competitive and possibly out-perform existing proposals for next-generation neutrinoless double-beta decay experiments. We discuss the detection principles, design specifications, physics potential and R&D plans to construct a detector with 100 kg fiducial mass in the double-beta decay emitting isotope Xe(136), to be installed in the Canfranc Underground Laboratory. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0907.4054v1-abstract-full').style.display = 'none'; document.getElementById('0907.4054v1-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 July, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">Letter of Intent to the LSC Scientific Committee 115 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0708.3987">arXiv:0708.3987</a> <span> [<a href="https://arxiv.org/pdf/0708.3987">pdf</a>, <a href="https://arxiv.org/ps/0708.3987">ps</a>, <a href="https://arxiv.org/format/0708.3987">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.astropartphys.2007.08.008">10.1016/j.astropartphys.2007.08.008 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Background reduction and sensitivity for germanium double beta decay experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=G%C3%B3mez%2C+H">H. G贸mez</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/nucl-ex?searchtype=author&query=Morales%2C+J">J. Morales</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+J+A">J. A. Villar</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="0708.3987v1-abstract-short" style="display: inline;"> Germanium detectors have very good capabilities for the investigation of rare phenomena like the neutrinoless double beta decay. Rejection of the background entangling the expected signal is one primary goal in this kind of experiments. Here, the attainable background reduction in the energy region where the neutrinoless double beta decay signal of 76Ge is expected to appear has been evaluated f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0708.3987v1-abstract-full').style.display = 'inline'; document.getElementById('0708.3987v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0708.3987v1-abstract-full" style="display: none;"> Germanium detectors have very good capabilities for the investigation of rare phenomena like the neutrinoless double beta decay. Rejection of the background entangling the expected signal is one primary goal in this kind of experiments. Here, the attainable background reduction in the energy region where the neutrinoless double beta decay signal of 76Ge is expected to appear has been evaluated for experiments using germanium detectors, taking into consideration different strategies like the granularity of the detector system, the segmentation of each individual germanium detector and the application of Pulse Shape Analysis techniques to discriminate signal from background events. Detection efficiency to the signal is affected by background rejection techniques, and therefore it has been estimated for each of the background rejection scenarios considered. Finally, conditions regarding crystal mass, radiopurity, exposure to cosmic rays, shielding and rejection capabilities are discussed with the aim to achieve a background level of 10-3 c keV-1 kg-1 y-1 in the region of interest, which would allow to explore neutrino effective masses around 40 meV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0708.3987v1-abstract-full').style.display = 'none'; document.getElementById('0708.3987v1-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 August, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2007. </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, 19 figures. Accepted by Astroparticle Physics</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Astropart.Phys.28:435-447,2007 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ex/0202026">arXiv:hep-ex/0202026</a> <span> [<a href="https://arxiv.org/pdf/hep-ex/0202026">pdf</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/10.1103/PhysRevD.65.092007">10.1103/PhysRevD.65.092007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Igex 76ge Neutrinoless Double-Beta Decay Experiment: Prospects for Next Generation Experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Aalseth%2C+C+E">C. E. Aalseth</a>, <a href="/search/nucl-ex?searchtype=author&query=Avignone%2C+F+T">F. T. Avignone III</a>, <a href="/search/nucl-ex?searchtype=author&query=Brodzinski%2C+R+L">R. L. Brodzinski</a>, <a href="/search/nucl-ex?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/nucl-ex?searchtype=author&query=Garcia%2C+E">E. Garcia</a>, <a href="/search/nucl-ex?searchtype=author&query=Gonzalez%2C+D">D. Gonzalez</a>, <a href="/search/nucl-ex?searchtype=author&query=Hensley%2C+W+K">W. K. Hensley</a>, <a href="/search/nucl-ex?searchtype=author&query=Irastorza%2C+I+G">I. G. Irastorza</a>, <a href="/search/nucl-ex?searchtype=author&query=Kirpichnikov%2C+I+V">I. V. Kirpichnikov</a>, <a href="/search/nucl-ex?searchtype=author&query=Klimenko%2C+A+A">A. A. Klimenko</a>, <a href="/search/nucl-ex?searchtype=author&query=Miley%2C+H+S">H. S. Miley</a>, <a href="/search/nucl-ex?searchtype=author&query=Morales%2C+A">A. Morales</a>, <a href="/search/nucl-ex?searchtype=author&query=Morales%2C+J">J. Morales</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Solorzano%2C+A+O">A. Ortiz de Solorzano</a>, <a href="/search/nucl-ex?searchtype=author&query=Osetrov%2C+S+B">S. B. Osetrov</a>, <a href="/search/nucl-ex?searchtype=author&query=Pogosov%2C+V+S">V. S. Pogosov</a>, <a href="/search/nucl-ex?searchtype=author&query=Puimedon%2C+J">J. Puimedon</a>, <a href="/search/nucl-ex?searchtype=author&query=Reeves%2C+J+H">J. H. Reeves</a>, <a href="/search/nucl-ex?searchtype=author&query=Sarsa%2C+M+L">M. L. Sarsa</a>, <a href="/search/nucl-ex?searchtype=author&query=Smolnikov%2C+A+A">A. A. Smolnikov</a>, <a href="/search/nucl-ex?searchtype=author&query=Starostin%2C+A+S">A. S. Starostin</a>, <a href="/search/nucl-ex?searchtype=author&query=Tamanyan%2C+A+G">A. G. Tamanyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Vasenko%2C+A+A">A. A. Vasenko</a>, <a href="/search/nucl-ex?searchtype=author&query=Vasiliev%2C+S+I">S. I. Vasiliev</a>, <a href="/search/nucl-ex?searchtype=author&query=Villar%2C+J+A">J. A. Villar</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="hep-ex/0202026v1-abstract-short" style="display: inline;"> The International Germanium Experiment (IGEX) has analyzed 117 mole yr of 76Ge data from its isotopically enriched (86% 76Ge) germanium detectors. Applying pulse-shape discrimination (PSD) to the more recent data, the lower bound on the half-life for neutrinoless double-beta decay of 76Ge is: $T_{1/2}(0谓)> 1.57 \times 10^{25}$ yr (90% C.L.). This corresponds to an upper bound in the Majorana neu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ex/0202026v1-abstract-full').style.display = 'inline'; document.getElementById('hep-ex/0202026v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ex/0202026v1-abstract-full" style="display: none;"> The International Germanium Experiment (IGEX) has analyzed 117 mole yr of 76Ge data from its isotopically enriched (86% 76Ge) germanium detectors. Applying pulse-shape discrimination (PSD) to the more recent data, the lower bound on the half-life for neutrinoless double-beta decay of 76Ge is: $T_{1/2}(0谓)> 1.57 \times 10^{25}$ yr (90% C.L.). This corresponds to an upper bound in the Majorana neutrino mass parameter,$<m_谓>$, between 0.33 eV and 1.35 eV, depending on the choice of theoretical nuclear matrix elements used in the analysis. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ex/0202026v1-abstract-full').style.display = 'none'; document.getElementById('hep-ex/0202026v1-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, 2002; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2002. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.D65:092007,2002 </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 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