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<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/2311.12042">arXiv:2311.12042</a> <span> [<a href="https://arxiv.org/pdf/2311.12042">pdf</a>, <a href="https://arxiv.org/format/2311.12042">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Emerging Technologies">cs.ET</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Atomic Defect-Aware Physical Design of Silicon Dangling Bond Logic on the H-Si(100)2x1 Surface </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walter%2C+M">Marcel Walter</a>, <a href="/search/physics?searchtype=author&query=Croshaw%2C+J">Jeremiah Croshaw</a>, <a href="/search/physics?searchtype=author&query=Ng%2C+S+S+H">Samuel Sze Hang Ng</a>, <a href="/search/physics?searchtype=author&query=Walus%2C+K">Konrad Walus</a>, <a href="/search/physics?searchtype=author&query=Wolkow%2C+R">Robert Wolkow</a>, <a href="/search/physics?searchtype=author&query=Wille%2C+R">Robert Wille</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="2311.12042v1-abstract-short" style="display: inline;"> Although fabrication capabilities of Silicon Dangling Bonds have rapidly advanced from manual labor-driven laboratory work to automated manufacturing in just recent years, sub-nanometer substrate defects still pose a hindrance to production due to the need for atomic precision. In essence, unpassivated or missing surface atoms, contaminants, and structural deformations disturb the fabricated logic… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.12042v1-abstract-full').style.display = 'inline'; document.getElementById('2311.12042v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.12042v1-abstract-full" style="display: none;"> Although fabrication capabilities of Silicon Dangling Bonds have rapidly advanced from manual labor-driven laboratory work to automated manufacturing in just recent years, sub-nanometer substrate defects still pose a hindrance to production due to the need for atomic precision. In essence, unpassivated or missing surface atoms, contaminants, and structural deformations disturb the fabricated logic or prevent its realization altogether. Moreover, design automation techniques in this domain have not yet adopted any defect-aware behavior to circumvent the present obstacles. In this paper, we derive a surface defect model for design automation from experimentally verified defect types that we apply to identify sensitivities in an established gate library in an effort to generate more robust designs. Furthermore, we present an automatic placement and routing algorithm that considers scanning tunneling microscope data obtained from physical experiments to lay out dot-accurate circuitry that is resilient against the presence of atomic surface defects. This culminates in a holistic evaluation on surface data of varying defect rates that enables us to quantify the severity of such defects. We project that fabrication capabilities must achieve defect rates of around 0.1 %, if charged defects can be completely eliminated, or < 0.1 %, otherwise. This realization sets the pace for future efforts to scale up this promising circuit technology. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.12042v1-abstract-full').style.display = 'none'; document.getElementById('2311.12042v1-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 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 5 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/2310.18176">arXiv:2310.18176</a> <span> [<a href="https://arxiv.org/pdf/2310.18176">pdf</a>, <a href="https://arxiv.org/format/2310.18176">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> A diamond anvil microassembly for Joule heating and electrical measurements up to 150 GPa and 4000 K </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Geballe%2C+Z+M">Zachary M. Geballe</a>, <a href="/search/physics?searchtype=author&query=Vitale%2C+S+M">Suzy M. Vitale</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+J">Jing Yang</a>, <a href="/search/physics?searchtype=author&query=Miozzi%2C+F">Francesca Miozzi</a>, <a href="/search/physics?searchtype=author&query=Dobrosavljevic%2C+V+V">Vasilije V. Dobrosavljevic</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M+J">Michael J. Walter</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="2310.18176v1-abstract-short" style="display: inline;"> When diamond anvil cell (DAC) sample chambers are outfitted with both thermal insulation and electrodes, two cutting-edge experimental methods are enabled: Joule heating with spectroradiometric temperature measurement, and electrical resistance measurements of samples heated to thousands of kelvin. The accuracy of temperature and resistance measurements, however, often suffers from poor control of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.18176v1-abstract-full').style.display = 'inline'; document.getElementById('2310.18176v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.18176v1-abstract-full" style="display: none;"> When diamond anvil cell (DAC) sample chambers are outfitted with both thermal insulation and electrodes, two cutting-edge experimental methods are enabled: Joule heating with spectroradiometric temperature measurement, and electrical resistance measurements of samples heated to thousands of kelvin. The accuracy of temperature and resistance measurements, however, often suffers from poor control of the shape and location of the sample, electrodes, and thermal insulation. Here, we present a recipe for the reproducible and precise fabrication of DAC sample, electrodes, and thermal insulation using a three-layer microassembly. The microassembly contains two potassium chloride thermal insulation layers, four electrical leads, a sample, and a buttressing layer made of polycrystalline alumina. The sample, innermost electrodes, and buttress layer are fabricated by focused-ion-beam milling. Three iron samples are presented as proof of concept. Each is successfully compressed and pulsed Joule heated while maintaining a four-point probe configuration. The highest pressure-temperature condition achieved is $\sim 150$ GPa and $\sim 4000$ K. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.18176v1-abstract-full').style.display = 'none'; document.getElementById('2310.18176v1-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 15 figures, 2 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.16660">arXiv:2310.16660</a> <span> [<a href="https://arxiv.org/pdf/2310.16660">pdf</a>, <a href="https://arxiv.org/format/2310.16660">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> </div> </div> <p class="title is-5 mathjax"> Spectroradiometry with sub-microsecond time resolution using multianode photomultiplier tube assemblies </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Geballe%2C+Z+M">Zachary M. Geballe</a>, <a href="/search/physics?searchtype=author&query=Miozzi%2C+F">Francesca Miozzi</a>, <a href="/search/physics?searchtype=author&query=Anto%2C+C+F">Chris F. Anto</a>, <a href="/search/physics?searchtype=author&query=Rojas%2C+J">Javier Rojas</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+J">Jing Yang</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M+J">Michael J. Walter</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="2310.16660v1-abstract-short" style="display: inline;"> Accurate and precise measurements of spectroradiometric temperature are crucial for many high pressure experiments that use diamond anvil cells or shock waves. In experiments with sub-millisecond timescales, specialized detectors such as streak cameras or photomultiplier tubes are required to measure temperature. High accuracy and precision are difficult to attain, especially at temperatures below… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.16660v1-abstract-full').style.display = 'inline'; document.getElementById('2310.16660v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.16660v1-abstract-full" style="display: none;"> Accurate and precise measurements of spectroradiometric temperature are crucial for many high pressure experiments that use diamond anvil cells or shock waves. In experiments with sub-millisecond timescales, specialized detectors such as streak cameras or photomultiplier tubes are required to measure temperature. High accuracy and precision are difficult to attain, especially at temperatures below 3000 K. Here we present a new spectroradiometry system based on multianode photomultiplier tube technology and passive readout circuitry that yields a 0.24 $渭$s rise-time for each channel. Temperature is measured using five color spectroradiometry. During high pressure pulsed Joule heating experiments in a diamond anvil cell, we document measurement precision to be $\pm 30$ K at temperatures as low as 2000 K during single-shot heating experiments with $0.6$ $渭$s time-resolution. Ambient pressure melting tests using pulsed Joule heating indicate that the accuracy is $\pm 80$ K in the temperature range 1800-2700 K. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.16660v1-abstract-full').style.display = 'none'; document.getElementById('2310.16660v1-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 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 18 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.15297">arXiv:2310.15297</a> <span> [<a href="https://arxiv.org/pdf/2310.15297">pdf</a>, <a href="https://arxiv.org/format/2310.15297">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> </div> </div> <p class="title is-5 mathjax"> A broadband pulse amplifier for Joule heating experiments in diamond anvil cells </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Geballe%2C+Z+M">Zachary M. Geballe</a>, <a href="/search/physics?searchtype=author&query=Lai%2C+J">Joseph Lai</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M+J">Michael J. Walter</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="2310.15297v2-abstract-short" style="display: inline;"> Decades of measurements of the thermophysical properties of hot metals show that pulsed Joule heating is an effective method to heat solid and liquid metals that are chemically reactive or difficult to contain. In order to extend such measurements to megabar pressures, pulsed heating methods must be integrated with diamond anvil cells. We report the design and characterization of a new pulse ampli… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.15297v2-abstract-full').style.display = 'inline'; document.getElementById('2310.15297v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.15297v2-abstract-full" style="display: none;"> Decades of measurements of the thermophysical properties of hot metals show that pulsed Joule heating is an effective method to heat solid and liquid metals that are chemically reactive or difficult to contain. In order to extend such measurements to megabar pressures, pulsed heating methods must be integrated with diamond anvil cells. We report the design and characterization of a new pulse amplifier that can heat $\sim 5$ to $50$ $渭$m-diameter metal wires to 1000s of kelvin at megabar pressures using diamond anvil cells. Pulse durations and peak currents can each be varied over 3 orders of magnitude, from 5 $渭$s to 10 ms and 0.2 to 200 A. The pulse amplifier is integrated with a current probe. Two voltage probes attached to the body of a diamond anvil cell can be used to measure voltage in a four point probe geometry. The accuracy of four point probe resistance measurements for a dummy sample with 0.1 $惟$ resistance are typically better than $5 \%$ at all times from 2 $渭$s to 10 ms after the beginning of the pulse. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.15297v2-abstract-full').style.display = 'none'; document.getElementById('2310.15297v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 6 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/2310.14776">arXiv:2310.14776</a> <span> [<a href="https://arxiv.org/pdf/2310.14776">pdf</a>, <a href="https://arxiv.org/format/2310.14776">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/5.0182685">10.1063/5.0182685 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> GPAW: An open Python package for electronic-structure calculations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mortensen%2C+J+J">Jens J酶rgen Mortensen</a>, <a href="/search/physics?searchtype=author&query=Larsen%2C+A+H">Ask Hjorth Larsen</a>, <a href="/search/physics?searchtype=author&query=Kuisma%2C+M">Mikael Kuisma</a>, <a href="/search/physics?searchtype=author&query=Ivanov%2C+A+V">Aleksei V. Ivanov</a>, <a href="/search/physics?searchtype=author&query=Taghizadeh%2C+A">Alireza Taghizadeh</a>, <a href="/search/physics?searchtype=author&query=Peterson%2C+A">Andrew Peterson</a>, <a href="/search/physics?searchtype=author&query=Haldar%2C+A">Anubhab Haldar</a>, <a href="/search/physics?searchtype=author&query=Dohn%2C+A+O">Asmus Ougaard Dohn</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%A4fer%2C+C">Christian Sch盲fer</a>, <a href="/search/physics?searchtype=author&query=J%C3%B3nsson%2C+E+%C3%96">Elvar 脰rn J贸nsson</a>, <a href="/search/physics?searchtype=author&query=Hermes%2C+E+D">Eric D. Hermes</a>, <a href="/search/physics?searchtype=author&query=Nilsson%2C+F+A">Fredrik Andreas Nilsson</a>, <a href="/search/physics?searchtype=author&query=Kastlunger%2C+G">Georg Kastlunger</a>, <a href="/search/physics?searchtype=author&query=Levi%2C+G">Gianluca Levi</a>, <a href="/search/physics?searchtype=author&query=J%C3%B3nsson%2C+H">Hannes J贸nsson</a>, <a href="/search/physics?searchtype=author&query=H%C3%A4kkinen%2C+H">Hannu H盲kkinen</a>, <a href="/search/physics?searchtype=author&query=Fojt%2C+J">Jakub Fojt</a>, <a href="/search/physics?searchtype=author&query=Kangsabanik%2C+J">Jiban Kangsabanik</a>, <a href="/search/physics?searchtype=author&query=S%C3%B8dequist%2C+J">Joachim S酶dequist</a>, <a href="/search/physics?searchtype=author&query=Lehtom%C3%A4ki%2C+J">Jouko Lehtom盲ki</a>, <a href="/search/physics?searchtype=author&query=Heske%2C+J">Julian Heske</a>, <a href="/search/physics?searchtype=author&query=Enkovaara%2C+J">Jussi Enkovaara</a>, <a href="/search/physics?searchtype=author&query=Winther%2C+K+T">Kirsten Tr酶strup Winther</a>, <a href="/search/physics?searchtype=author&query=Dulak%2C+M">Marcin Dulak</a>, <a href="/search/physics?searchtype=author&query=Melander%2C+M+M">Marko M. Melander</a> , et al. (22 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="2310.14776v2-abstract-short" style="display: inline;"> We review the GPAW open-source Python package for electronic structure calculations. GPAW is based on the projector-augmented wave method and can solve the self-consistent density functional theory (DFT) equations using three different wave-function representations, namely real-space grids, plane waves, and numerical atomic orbitals. The three representations are complementary and mutually indepen… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.14776v2-abstract-full').style.display = 'inline'; document.getElementById('2310.14776v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.14776v2-abstract-full" style="display: none;"> We review the GPAW open-source Python package for electronic structure calculations. GPAW is based on the projector-augmented wave method and can solve the self-consistent density functional theory (DFT) equations using three different wave-function representations, namely real-space grids, plane waves, and numerical atomic orbitals. The three representations are complementary and mutually independent and can be connected by transformations via the real-space grid. This multi-basis feature renders GPAW highly versatile and unique among similar codes. By virtue of its modular structure, the GPAW code constitutes an ideal platform for implementation of new features and methodologies. Moreover, it is well integrated with the Atomic Simulation Environment (ASE) providing a flexible and dynamic user interface. In addition to ground-state DFT calculations, GPAW supports many-body GW band structures, optical excitations from the Bethe-Salpeter Equation (BSE), variational calculations of excited states in molecules and solids via direct optimization, and real-time propagation of the Kohn-Sham equations within time-dependent DFT. A range of more advanced methods to describe magnetic excitations and non-collinear magnetism in solids are also now available. In addition, GPAW can calculate non-linear optical tensors of solids, charged crystal point defects, and much more. Recently, support of GPU acceleration has been achieved with minor modifications of the GPAW code thanks to the CuPy library. We end the review with an outlook describing some future plans for GPAW. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.14776v2-abstract-full').style.display = 'none'; document.getElementById('2310.14776v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Chemical Physics 160, 092503 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2308.04487">arXiv:2308.04487</a> <span> [<a href="https://arxiv.org/pdf/2308.04487">pdf</a>, <a href="https://arxiv.org/format/2308.04487">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> The Need for Speed: Efficient Exact Simulation of Silicon Dangling Bond Logic </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Drewniok%2C+J">Jan Drewniok</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Marcel Walter</a>, <a href="/search/physics?searchtype=author&query=Wille%2C+R">Robert Wille</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="2308.04487v1-abstract-short" style="display: inline;"> The Silicon Dangling Bond (SiDB) logic platform, an emerging computational beyond-CMOS nanotechnology, is a promising competitor due to its ability to achieve integration density and clock speed values that are several orders of magnitude higher compared to current CMOS fabrication nodes. However, the exact physical simulation of SiDB layouts, which is an essential component of any design validati… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.04487v1-abstract-full').style.display = 'inline'; document.getElementById('2308.04487v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.04487v1-abstract-full" style="display: none;"> The Silicon Dangling Bond (SiDB) logic platform, an emerging computational beyond-CMOS nanotechnology, is a promising competitor due to its ability to achieve integration density and clock speed values that are several orders of magnitude higher compared to current CMOS fabrication nodes. However, the exact physical simulation of SiDB layouts, which is an essential component of any design validation workflow, is computationally expensive. In this paper, we propose a novel algorithm called QuickExact, which aims to be both, efficient and exact. To this end, we are introducing three techniques, namely 1) Physically-informed Search Space Pruning, 2) Partial Solution Caching, and 3) Effective State Enumeration. Extensive experimental evaluations confirm that, compared to the state-of-the-art algorithm, the resulting approach leads to a paramount runtime advantage of more than a factor of 5000 on randomly generated layouts and more than a factor of 2000 on an established gate library. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.04487v1-abstract-full').style.display = 'none'; document.getElementById('2308.04487v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 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/2303.03422">arXiv:2303.03422</a> <span> [<a href="https://arxiv.org/pdf/2303.03422">pdf</a>, <a href="https://arxiv.org/format/2303.03422">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> QuickSim: Efficient and Accurate Physical Simulation of Silicon Dangling Bond Logic </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Drewniok%2C+J">Jan Drewniok</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Marcel Walter</a>, <a href="/search/physics?searchtype=author&query=Ng%2C+S+S+H">Samuel Sze Hang Ng</a>, <a href="/search/physics?searchtype=author&query=Walus%2C+K">Konrad Walus</a>, <a href="/search/physics?searchtype=author&query=Wille%2C+R">Robert Wille</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="2303.03422v1-abstract-short" style="display: inline;"> Silicon Dangling Bonds have established themselves as a promising competitor in the field of beyond-CMOS technologies. Their integration density and potential for energy dissipation advantages of several orders of magnitude over conventional circuit technologies sparked the interest of academia and industry alike. While fabrication capabilities advance rapidly and first design automation methodolo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.03422v1-abstract-full').style.display = 'inline'; document.getElementById('2303.03422v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.03422v1-abstract-full" style="display: none;"> Silicon Dangling Bonds have established themselves as a promising competitor in the field of beyond-CMOS technologies. Their integration density and potential for energy dissipation advantages of several orders of magnitude over conventional circuit technologies sparked the interest of academia and industry alike. While fabrication capabilities advance rapidly and first design automation methodologies have been proposed, physical simulation effectiveness has yet to keep pace. Established algorithms in this domain either suffer from exponential runtime behavior or subpar accuracy levels. In this work, we propose a novel algorithm for the physical simulation of Silicon Dangling Bond systems based on statistical methods that offers both a time-to-solution and an accuracy advantage over the state of the art by more than one order of magnitude and a factor of more than three, respectively, as demonstrated by an exhaustive experimental evaluation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.03422v1-abstract-full').style.display = 'none'; document.getElementById('2303.03422v1-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 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/2212.13514">arXiv:2212.13514</a> <span> [<a href="https://arxiv.org/pdf/2212.13514">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Space Physics">physics.space-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atmospheric and Oceanic Physics">physics.ao-ph</span> </div> </div> <p class="title is-5 mathjax"> Forbush decrease observed by SEVAN particle detector network on November 4, 2021 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chilingarian%2C+A">A. Chilingarian</a>, <a href="/search/physics?searchtype=author&query=Hovsepyan%2C+G">G. Hovsepyan</a>, <a href="/search/physics?searchtype=author&query=Martoyan%2C+H">H. Martoyan</a>, <a href="/search/physics?searchtype=author&query=Karapetyan%2C+T">T. Karapetyan</a>, <a href="/search/physics?searchtype=author&query=Sargsyan%2C+B">B. Sargsyan</a>, <a href="/search/physics?searchtype=author&query=Nokolova%2C+N">N. Nokolova</a>, <a href="/search/physics?searchtype=author&query=Angelov%2C+H">H. Angelov</a>, <a href="/search/physics?searchtype=author&query=Haas%2C+D">D. Haas</a>, <a href="/search/physics?searchtype=author&query=Knapp%2C+J">J. Knapp</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">M. Walter</a>, <a href="/search/physics?searchtype=author&query=Ploc%2C+O">O. Ploc</a>, <a href="/search/physics?searchtype=author&query=Shlegl%2C+J">J. Shlegl</a>, <a href="/search/physics?searchtype=author&query=Kakona%2C+M">M. Kakona</a>, <a href="/search/physics?searchtype=author&query=Ambrosova%2C+I">I. Ambrosova</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="2212.13514v1-abstract-short" style="display: inline;"> On November 3-4 2021, an interplanetary coronal mass injection (ICME) hits the magnetosphere, sparking a strong G3-class geomagnetic storm and auroras as far south as California and New Mexico. All detectors of the SEVAN network registered a Forbush decrease (FD) of 5-10 percentdeep in 1 minute time series of count rates. We present the results of a comparison of Fd registered on mountain altitude… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.13514v1-abstract-full').style.display = 'inline'; document.getElementById('2212.13514v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2212.13514v1-abstract-full" style="display: none;"> On November 3-4 2021, an interplanetary coronal mass injection (ICME) hits the magnetosphere, sparking a strong G3-class geomagnetic storm and auroras as far south as California and New Mexico. All detectors of the SEVAN network registered a Forbush decrease (FD) of 5-10 percentdeep in 1 minute time series of count rates. We present the results of a comparison of Fd registered on mountain altitudes on Aragats (Armenia), Lomnicky Stit (Slovakia), Musala (Bulgaria), and at sea level DESY (Hamburg, Germany), and in Mileshovka, Czechia. We present as well purity and barometric coefficients of different coincidences of SEVAN detector layers on Aragats. We demonstrate disturbances of the near-surface electric (NSEF) and geomagnetic fields at the arrival of the ICME on Earth. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.13514v1-abstract-full').style.display = 'none'; document.getElementById('2212.13514v1-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 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.01172">arXiv:2201.01172</a> <span> [<a href="https://arxiv.org/pdf/2201.01172">pdf</a>, <a href="https://arxiv.org/format/2201.01172">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/5.0073503">10.1063/5.0073503 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Excitation dynamics in polyacene molecules on rare-gas clusters </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bohlen%2C+M">Matthias Bohlen</a>, <a href="/search/physics?searchtype=author&query=Michiels%2C+R">Rupert Michiels</a>, <a href="/search/physics?searchtype=author&query=Michelbach%2C+M">Moritz Michelbach</a>, <a href="/search/physics?searchtype=author&query=Ferchane%2C+S">Selmane Ferchane</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Michael Walter</a>, <a href="/search/physics?searchtype=author&query=Eisfeld%2C+A">Alexander Eisfeld</a>, <a href="/search/physics?searchtype=author&query=Stienkemeier%2C+F">Frank Stienkemeier</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2201.01172v1-abstract-short" style="display: inline;"> Laser-induced fluorescence spectra and excitation lifetimes of anthracene, tetracene, and pentacene molecules attached to the surface of solid argon clusters have been measured with respect to cluster size, density of molecules and excitation density. Results are compared to previous studies on the same sample molecules attached to neon clusters. A contrasting lifetime behavior of anthracene on ne… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.01172v1-abstract-full').style.display = 'inline'; document.getElementById('2201.01172v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.01172v1-abstract-full" style="display: none;"> Laser-induced fluorescence spectra and excitation lifetimes of anthracene, tetracene, and pentacene molecules attached to the surface of solid argon clusters have been measured with respect to cluster size, density of molecules and excitation density. Results are compared to previous studies on the same sample molecules attached to neon clusters. A contrasting lifetime behavior of anthracene on neon and argon clusters is discussed, and mechanisms are suggested to interpret the results. Although both neon and argon clusters are considered to be weakly interacting environments, we find that the excitation decay dynamics of the studied acenes depends significantly on the cluster material. Moreover, we find even qualitative differences regarding the dependence on the dopant density. Based on these observations, previous assignments of collective radiative and non-radiative decay mechanisms are discussed in the context of the new experimental findings. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.01172v1-abstract-full').style.display = 'none'; document.getElementById('2201.01172v1-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> 4 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.10578">arXiv:2111.10578</a> <span> [<a href="https://arxiv.org/pdf/2111.10578">pdf</a>, <a href="https://arxiv.org/ps/2111.10578">ps</a>, <a href="https://arxiv.org/format/2111.10578">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chaotic Dynamics">nlin.CD</span> </div> </div> <p class="title is-5 mathjax"> Thermodynamic properties and Hilbert space of the human brain </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Shi%2C+D">Dongmei Shi</a>, <a href="/search/physics?searchtype=author&query=Li%2C+M">Meng Li</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Martin Walter</a>, <a href="/search/physics?searchtype=author&query=Noori%2C+H+R">Hamid R. Noori</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="2111.10578v2-abstract-short" style="display: inline;"> Any macrosystem consists of many microparticles. According to statistical physics, the macroproperties of a system are realized as the statistical average of the corresponding microproperties. In our study, a model based on ensemble theory from statistical physics is proposed. Specifically, the functional connectivity (FC) patterns confirmed by Leading Eigenvector Dynamics Analysis (LEiDA) are tak… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.10578v2-abstract-full').style.display = 'inline'; document.getElementById('2111.10578v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.10578v2-abstract-full" style="display: none;"> Any macrosystem consists of many microparticles. According to statistical physics, the macroproperties of a system are realized as the statistical average of the corresponding microproperties. In our study, a model based on ensemble theory from statistical physics is proposed. Specifically, the functional connectivity (FC) patterns confirmed by Leading Eigenvector Dynamics Analysis (LEiDA) are taken as the microstates of a system, and static functional connectivity (SFC) is seen as the macrostate. When SFC can be written as the linear combination of these FC patterns, it is realized that these FC patterns are valid microstates for which the statistical results of relevant behaviors can describe the corresponding properties of SFC. In this case, the thermodynamic functions in ensemble theory are expressed in terms of these microstates. We apply the model to study the biological effect of ketamine on the brain and prove by maximum work principle that compared to that in the control group, the capability of work done by the brain that has been injected with ketamine declines significantly. Moreover, the quantum mechanical operator of the brain is further studied, and a Hilbert space spanned by the eigenvectors of the operator is obtained. The confirmation of the mechanical operator and Hilbert space opens great possibilities of using quantum mechanics to study brain systems, which would herald a new era in relevant neuroscience studies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.10578v2-abstract-full').style.display = 'none'; document.getElementById('2111.10578v2-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 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 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">10 pages, 2 figures,2 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.14711">arXiv:2007.14711</a> <span> [<a href="https://arxiv.org/pdf/2007.14711">pdf</a>, <a href="https://arxiv.org/format/2007.14711">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="Space Physics">physics.space-ph</span> </div> </div> <p class="title is-5 mathjax"> The mini-neutron monitor: A new approach in neutron monitor design </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Strauss%2C+D+T">Du Toit Strauss</a>, <a href="/search/physics?searchtype=author&query=Poluianov%2C+S">Stepan Poluianov</a>, <a href="/search/physics?searchtype=author&query=van+der+Merwe%2C+C">Cobus van der Merwe</a>, <a href="/search/physics?searchtype=author&query=Kr%C3%BCger%2C+H">Hendrik Kr眉ger</a>, <a href="/search/physics?searchtype=author&query=Diedericks%2C+C">Corrie Diedericks</a>, <a href="/search/physics?searchtype=author&query=Kr%C3%BCger%2C+H">Helena Kr眉ger</a>, <a href="/search/physics?searchtype=author&query=Usoskin%2C+I">Ilya Usoskin</a>, <a href="/search/physics?searchtype=author&query=Heber%2C+B">Bernd Heber</a>, <a href="/search/physics?searchtype=author&query=Nndanganeni%2C+R">Rendani Nndanganeni</a>, <a href="/search/physics?searchtype=author&query=Blanco-%C3%81valos%2C+J">Juanjo Blanco-脕valos</a>, <a href="/search/physics?searchtype=author&query=Garc%C3%ADa-Tejedor%2C+I">Ignacio Garc铆a-Tejedor</a>, <a href="/search/physics?searchtype=author&query=Herbst%2C+K">Konstantin Herbst</a>, <a href="/search/physics?searchtype=author&query=Caballero-Lopez%2C+R">Rogelio Caballero-Lopez</a>, <a href="/search/physics?searchtype=author&query=Moloto%2C+K">Katlego Moloto</a>, <a href="/search/physics?searchtype=author&query=Lara%2C+A">Alejandro Lara</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Michael Walter</a>, <a href="/search/physics?searchtype=author&query=Giday%2C+N+M">Nigussie Mezgebe Giday</a>, <a href="/search/physics?searchtype=author&query=Traversi%2C+R">Rita Traversi</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="2007.14711v1-abstract-short" style="display: inline;"> The near-Earth cosmic ray flux has been monitored for more than 70 years by a network of ground-based neutron monitors (NMs). With the ever-increasing importance of quantifying the radiation risk and effects of cosmic rays for, e.g., air and space-travel, it is essential to continue operating the existing NM stations, while expanding this crucial network. In this paper, we discuss a smaller and co… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.14711v1-abstract-full').style.display = 'inline'; document.getElementById('2007.14711v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.14711v1-abstract-full" style="display: none;"> The near-Earth cosmic ray flux has been monitored for more than 70 years by a network of ground-based neutron monitors (NMs). With the ever-increasing importance of quantifying the radiation risk and effects of cosmic rays for, e.g., air and space-travel, it is essential to continue operating the existing NM stations, while expanding this crucial network. In this paper, we discuss a smaller and cost-effective version of the traditional NM, the mini-NM. These monitors can be deployed with ease, even to extremely remote locations, where they operate in a semi-autonomous fashion. We believe that the mini-NM, therefore, offers the opportunity to increase the sensitivity and expand the coverage of the existing NM network, making this network more suitable to near-real-time monitoring for space weather applications. In this paper, we present the technical details of the mini-NM's design and operation, and present a summary of the initial tests and science results. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.14711v1-abstract-full').style.display = 'none'; document.getElementById('2007.14711v1-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 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">Accepted for publication in Space Weather and Space Climate</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.07397">arXiv:1912.07397</a> <span> [<a href="https://arxiv.org/pdf/1912.07397">pdf</a>, <a href="https://arxiv.org/format/1912.07397">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.jctc.9b01251">10.1021/acs.jctc.9b01251 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Reliable computational prediction of supramolecular ordering of complex molecules under electrochemical conditions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Hartl%2C+B">Benedikt Hartl</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+S">Shubham Sharma</a>, <a href="/search/physics?searchtype=author&query=Br%C3%BCgner%2C+O">Oliver Br眉gner</a>, <a href="/search/physics?searchtype=author&query=Mertens%2C+S+F+L">Stijn F. L. Mertens</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Michael Walter</a>, <a href="/search/physics?searchtype=author&query=Kahl%2C+G">Gerhard Kahl</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="1912.07397v2-abstract-short" style="display: inline;"> We propose a computationally lean, two-stage approach that reliably predicts self-assembly behavior of complex charged molecules on a metallic surfaces under electrochemical conditions. Stage one uses ab initio simulations to provide reference data for the energies (evaluated for archetypical configurations) to fit the parameters of a conceptually much simpler and computationally less expensive mo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.07397v2-abstract-full').style.display = 'inline'; document.getElementById('1912.07397v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.07397v2-abstract-full" style="display: none;"> We propose a computationally lean, two-stage approach that reliably predicts self-assembly behavior of complex charged molecules on a metallic surfaces under electrochemical conditions. Stage one uses ab initio simulations to provide reference data for the energies (evaluated for archetypical configurations) to fit the parameters of a conceptually much simpler and computationally less expensive model of the molecules: classical, spherical particles, representing the respective atomic entities, a soft but perfectly conductive wall potential represents the metallic surface. Stage two feeds the energies that emerge from this classical model into highly efficient and reliable optimization techniques to identify via energy minimization the ordered ground state configurations of the molecules. We demonstrate the power of our approach by successfully reproducing, on a semi-quantitative level, the intricate supramolecular ordering observed experimentally for PQP$^+$ and ClO$_4^-$ molecules at an Au(111)-electrolyte interface, including the formation of open-porous, self-hosts--guest, and stratified bilayer phases as a function of the electric field at the solid--liquid interface. We also discuss the role of the perchlorate ions in the self-assembly process, whose positions could not be identified in the related experimental investigations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.07397v2-abstract-full').style.display = 'none'; document.getElementById('1912.07397v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.11124">arXiv:1907.11124</a> <span> [<a href="https://arxiv.org/pdf/1907.11124">pdf</a>, <a href="https://arxiv.org/ps/1907.11124">ps</a>, <a href="https://arxiv.org/format/1907.11124">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1367-2630/ab550d">10.1088/1367-2630/ab550d <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Locust: C++ software for simulation of RF detection </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Project+8+Collaboration"> Project 8 Collaboration</a>, <a href="/search/physics?searchtype=author&query=Esfahani%2C+A+A">A. Ashtari Esfahani</a>, <a href="/search/physics?searchtype=author&query=B%C3%B6ser%2C+S">S. B枚ser</a>, <a href="/search/physics?searchtype=author&query=Buzinsky%2C+N">N. Buzinsky</a>, <a href="/search/physics?searchtype=author&query=Cervantes%2C+R">R. Cervantes</a>, <a href="/search/physics?searchtype=author&query=Claessens%2C+C">C. Claessens</a>, <a href="/search/physics?searchtype=author&query=de+Viveiros%2C+L">L. de Viveiros</a>, <a href="/search/physics?searchtype=author&query=Fertl%2C+M">M. Fertl</a>, <a href="/search/physics?searchtype=author&query=Formaggio%2C+J+A">J. A. Formaggio</a>, <a href="/search/physics?searchtype=author&query=Gladstone%2C+L">L. Gladstone</a>, <a href="/search/physics?searchtype=author&query=Guigue%2C+M">M. Guigue</a>, <a href="/search/physics?searchtype=author&query=Heeger%2C+K+M">K. M. Heeger</a>, <a href="/search/physics?searchtype=author&query=Johnston%2C+J">J. Johnston</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+A+M">A. M. Jones</a>, <a href="/search/physics?searchtype=author&query=Kazkaz%2C+K">K. Kazkaz</a>, <a href="/search/physics?searchtype=author&query=LaRoque%2C+B+H">B. H. LaRoque</a>, <a href="/search/physics?searchtype=author&query=Lindman%2C+A">A. Lindman</a>, <a href="/search/physics?searchtype=author&query=Machado%2C+E">E. Machado</a>, <a href="/search/physics?searchtype=author&query=Monreal%2C+B">B. Monreal</a>, <a href="/search/physics?searchtype=author&query=Morrison%2C+E+C">E. C. Morrison</a>, <a href="/search/physics?searchtype=author&query=Nikkel%2C+J+A">J. A. Nikkel</a>, <a href="/search/physics?searchtype=author&query=Novitski%2C+E">E. Novitski</a>, <a href="/search/physics?searchtype=author&query=Oblath%2C+N+S">N. S. Oblath</a>, <a href="/search/physics?searchtype=author&query=Pettus%2C+W">W. Pettus</a>, <a href="/search/physics?searchtype=author&query=Robertson%2C+R+G+H">R. G. H. Robertson</a> , et al. (14 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="1907.11124v4-abstract-short" style="display: inline;"> The Locust simulation package is a new C++ software tool developed to simulate the measurement of time-varying electromagnetic fields using RF detection techniques. Modularity and flexibility allow for arbitrary input signals, while concurrently supporting tight integration with physics-based simulations as input. External signals driven by the Kassiopeia particle tracking package are discussed, d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.11124v4-abstract-full').style.display = 'inline'; document.getElementById('1907.11124v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.11124v4-abstract-full" style="display: none;"> The Locust simulation package is a new C++ software tool developed to simulate the measurement of time-varying electromagnetic fields using RF detection techniques. Modularity and flexibility allow for arbitrary input signals, while concurrently supporting tight integration with physics-based simulations as input. External signals driven by the Kassiopeia particle tracking package are discussed, demonstrating conditional feedback between Locust and Kassiopeia during software execution. An application of the simulation to the Project 8 experiment is described. Locust is publicly available at https://github.com/project8/locust_mc. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.11124v4-abstract-full').style.display = 'none'; document.getElementById('1907.11124v4-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 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> New J. Phys. 21, 113051 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.01488">arXiv:1906.01488</a> <span> [<a href="https://arxiv.org/pdf/1906.01488">pdf</a>, <a href="https://arxiv.org/format/1906.01488">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Dispersion forces in inhomogeneous planarly layered media: A one-dimensional model for effective polarisabilities </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fiedler%2C+J">Johannes Fiedler</a>, <a href="/search/physics?searchtype=author&query=Spallek%2C+F">Fabian Spallek</a>, <a href="/search/physics?searchtype=author&query=Thiyam%2C+P">Priyadarshini Thiyam</a>, <a href="/search/physics?searchtype=author&query=Persson%2C+C">Clas Persson</a>, <a href="/search/physics?searchtype=author&query=Bostr%C3%B6m%2C+M">Mathias Bostr枚m</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Michael Walter</a>, <a href="/search/physics?searchtype=author&query=Buhmann%2C+S+Y">Stefan Yoshi Buhmann</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="1906.01488v1-abstract-short" style="display: inline;"> Dispersion forces such as van der Waals forces between two microscopic particles, the Casimir--Polder forces between a particle and a macroscopic object or the Casimir force between two dielectric objects are well studied in vacuum. However, in realistic situations the interacting objects are often embedded in an environmental medium. Such a solvent influences the induced dipole interaction. With… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.01488v1-abstract-full').style.display = 'inline'; document.getElementById('1906.01488v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.01488v1-abstract-full" style="display: none;"> Dispersion forces such as van der Waals forces between two microscopic particles, the Casimir--Polder forces between a particle and a macroscopic object or the Casimir force between two dielectric objects are well studied in vacuum. However, in realistic situations the interacting objects are often embedded in an environmental medium. Such a solvent influences the induced dipole interaction. With the framework of macroscopic quantum electrodynamics, these interactions are mediated via an exchange of virtual photons. Via this method the impact of a homogeneous solvent medium can be expressed as local-field corrections leading to excess polarisabilities which have previously been derived for hard boundary conditions. In order to develop a more realistic description, we investigate on a one-dimensional analog system illustrating the influence of a continuous dielectric profile. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.01488v1-abstract-full').style.display = 'none'; document.getElementById('1906.01488v1-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> 4 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1902.02958">arXiv:1902.02958</a> <span> [<a href="https://arxiv.org/pdf/1902.02958">pdf</a>, <a href="https://arxiv.org/format/1902.02958">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> </div> <p class="title is-5 mathjax"> Fermi level pinning by defects can explain the large reported carbon 1s binding energy variations in diamond </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walter%2C+M">Michael Walter</a>, <a href="/search/physics?searchtype=author&query=Mangolini%2C+F">Filippo Mangolini</a>, <a href="/search/physics?searchtype=author&query=McClimon%2C+J+B">J. Brandon McClimon</a>, <a href="/search/physics?searchtype=author&query=Carpick%2C+R+W">Robert W. Carpick</a>, <a href="/search/physics?searchtype=author&query=Moseler%2C+M">Michael Moseler</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="1902.02958v2-abstract-short" style="display: inline;"> The quantitative evaluation of the carbon hybridization state by X-ray photoelectron spectroscopy (XPS) has been a surface-analysis problem for the last three decades due to the challenges associated with the unambiguous identification of the characteristic binding energy values for sp$^2$ and sp$^3$-bonded carbon. While the sp$^2$ binding energy is well established, there is disagreement for the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.02958v2-abstract-full').style.display = 'inline'; document.getElementById('1902.02958v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1902.02958v2-abstract-full" style="display: none;"> The quantitative evaluation of the carbon hybridization state by X-ray photoelectron spectroscopy (XPS) has been a surface-analysis problem for the last three decades due to the challenges associated with the unambiguous identification of the characteristic binding energy values for sp$^2$ and sp$^3$-bonded carbon. While the sp$^2$ binding energy is well established, there is disagreement for the sp$^3$ value in the literature. Here, we compute the binding energy values for model structures of pure and doped-diamond using density functional theory. The simulation results indicate that the large band-gap of diamond allows defects to pin the Fermi level, which results in large variations of the C(1s) core electron energies for sp$^3$-bonded carbon, in agreement with the broad range of experimental C(1s) binding energy values for sp$^3$ carbon reported in the literature. Fermi level pinning by boron is demonstrated by experimental C(1s) binding energies of highly B-doped ultrananocrystalline diamond that are in good agreement to simulations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.02958v2-abstract-full').style.display = 'none'; document.getElementById('1902.02958v2-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, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">revised version</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1901.02844">arXiv:1901.02844</a> <span> [<a href="https://arxiv.org/pdf/1901.02844">pdf</a>, <a href="https://arxiv.org/format/1901.02844">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/10.1103/PhysRevC.99.055501">10.1103/PhysRevC.99.055501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electron Radiated Power in Cyclotron Radiation Emission Spectroscopy Experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Esfahani%2C+A+A">A. Ashtari Esfahani</a>, <a href="/search/physics?searchtype=author&query=Bansal%2C+V">V. Bansal</a>, <a href="/search/physics?searchtype=author&query=Boser%2C+S">S. Boser</a>, <a href="/search/physics?searchtype=author&query=Buzinsky%2C+N">N. Buzinsky</a>, <a href="/search/physics?searchtype=author&query=Cervantes%2C+R">R. Cervantes</a>, <a href="/search/physics?searchtype=author&query=Claessens%2C+C">C. Claessens</a>, <a href="/search/physics?searchtype=author&query=de+Viveiros%2C+L">L. de Viveiros</a>, <a href="/search/physics?searchtype=author&query=Doe%2C+P+J">P. J. Doe</a>, <a href="/search/physics?searchtype=author&query=Fertl%2C+M">M. Fertl</a>, <a href="/search/physics?searchtype=author&query=Formaggio%2C+J+A">J. A. Formaggio</a>, <a href="/search/physics?searchtype=author&query=Gladstone%2C+L">L. Gladstone</a>, <a href="/search/physics?searchtype=author&query=Guigue%2C+M">M. Guigue</a>, <a href="/search/physics?searchtype=author&query=Heeger%2C+K+M">K. M. Heeger</a>, <a href="/search/physics?searchtype=author&query=Johnston%2C+J">J. Johnston</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+A+M">A. M. Jones</a>, <a href="/search/physics?searchtype=author&query=Kazkaz%2C+K">K. Kazkaz</a>, <a href="/search/physics?searchtype=author&query=LaRoque%2C+B+H">B. H. LaRoque</a>, <a href="/search/physics?searchtype=author&query=Leber%2C+M">M. Leber</a>, <a href="/search/physics?searchtype=author&query=Lindman%2C+A">A. Lindman</a>, <a href="/search/physics?searchtype=author&query=Machado%2C+E">E. Machado</a>, <a href="/search/physics?searchtype=author&query=Monreal%2C+B">B. Monreal</a>, <a href="/search/physics?searchtype=author&query=Morrison%2C+E+C">E. C. Morrison</a>, <a href="/search/physics?searchtype=author&query=Nikkel%2C+J+A">J. A. Nikkel</a>, <a href="/search/physics?searchtype=author&query=Novitski%2C+E">E. Novitski</a>, <a href="/search/physics?searchtype=author&query=Oblath%2C+N+S">N. S. Oblath</a> , et al. (16 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="1901.02844v1-abstract-short" style="display: inline;"> The recently developed technique of Cyclotron Radiation Emission Spectroscopy (CRES) uses frequency information from the cyclotron motion of an electron in a magnetic bottle to infer its kinetic energy. Here we derive the expected radio frequency signal from an electron in a waveguide CRES apparatus from first principles. We demonstrate that the frequency-domain signal is rich in information about… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.02844v1-abstract-full').style.display = 'inline'; document.getElementById('1901.02844v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1901.02844v1-abstract-full" style="display: none;"> The recently developed technique of Cyclotron Radiation Emission Spectroscopy (CRES) uses frequency information from the cyclotron motion of an electron in a magnetic bottle to infer its kinetic energy. Here we derive the expected radio frequency signal from an electron in a waveguide CRES apparatus from first principles. We demonstrate that the frequency-domain signal is rich in information about the electron's kinematic parameters, and extract a set of measurables that in a suitably designed system are sufficient for disentangling the electron's kinetic energy from the rest of its kinematic features. This lays the groundwork for high-resolution energy measurements in future CRES experiments, such as the Project 8 neutrino mass measurement. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.02844v1-abstract-full').style.display = 'none'; document.getElementById('1901.02844v1-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 January, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 99, 055501 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.03840">arXiv:1806.03840</a> <span> [<a href="https://arxiv.org/pdf/1806.03840">pdf</a>, <a href="https://arxiv.org/format/1806.03840">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.jctc.9b00584">10.1021/acs.jctc.9b00584 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ab-initio wave-length dependent Raman spectra: Placzek approximation and beyond </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walter%2C+M">Michael Walter</a>, <a href="/search/physics?searchtype=author&query=Moseler%2C+M">Michael Moseler</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="1806.03840v2-abstract-short" style="display: inline;"> We analyze how to obtain non-resonant and resonant Raman spectra within the Placzek as well as the Albrecht approximation. Both approximations are derived from the matrix element for light scattering by application of the Kramers, Heisenberg and Dirac formula. It is shown that the Placzek expression results from a semi-classical approximation of the combined electronic and vibrational transition e… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.03840v2-abstract-full').style.display = 'inline'; document.getElementById('1806.03840v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.03840v2-abstract-full" style="display: none;"> We analyze how to obtain non-resonant and resonant Raman spectra within the Placzek as well as the Albrecht approximation. Both approximations are derived from the matrix element for light scattering by application of the Kramers, Heisenberg and Dirac formula. It is shown that the Placzek expression results from a semi-classical approximation of the combined electronic and vibrational transition energies. Molecular hydrogen, water and butadiene are studied as test cases. It turns out that the Placzek approximation agrees qualitatively with the more accurate Albrecht formulation even in the resonant regime for the excitations of single vibrational quanta. However, multiple vibrational excitations are absent in Placzek, but can be of similar intensities as single excitations under resonance conditions. The Albrecht approximation takes multiple vibrational excitations into account and the resulting simulated spectra exhibit good agreement with experimental Raman spectra in the resonance region as well. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.03840v2-abstract-full').style.display = 'none'; document.getElementById('1806.03840v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">resubmission</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.03505">arXiv:1806.03505</a> <span> [<a href="https://arxiv.org/pdf/1806.03505">pdf</a>, <a href="https://arxiv.org/format/1806.03505">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atmospheric and Oceanic Physics">physics.ao-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1039/C9CP03165K">10.1039/C9CP03165K <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Impact of effective polarisability models on the predicted release dynamics of CH$_4$ and CO$_2$ from premelted ice </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fiedler%2C+J">J. Fiedler</a>, <a href="/search/physics?searchtype=author&query=Thiyam%2C+P">P. Thiyam</a>, <a href="/search/physics?searchtype=author&query=Burger%2C+F+A">F. A. Burger</a>, <a href="/search/physics?searchtype=author&query=Parsons%2C+D+F">D. F. Parsons</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">M. Walter</a>, <a href="/search/physics?searchtype=author&query=Brevik%2C+I">I. Brevik</a>, <a href="/search/physics?searchtype=author&query=Persson%2C+C">C. Persson</a>, <a href="/search/physics?searchtype=author&query=Buhmann%2C+S+Y">S. Y. Buhmann</a>, <a href="/search/physics?searchtype=author&query=Bostr%C3%B6m%2C+M">M. Bostr枚m</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="1806.03505v1-abstract-short" style="display: inline;"> We present a theory for Casimir--Polder forces acting on greenhouse gas molecules dissolved in a thin water film. Such a nanosized film has recently been predicted to arise on th surface of melting ice as stabilized by repulsive Lifshitz forces. We show that different models for the effective polarizability of greenhouse gas molecules in water lead to different predictions for how Casimir--Polder… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.03505v1-abstract-full').style.display = 'inline'; document.getElementById('1806.03505v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.03505v1-abstract-full" style="display: none;"> We present a theory for Casimir--Polder forces acting on greenhouse gas molecules dissolved in a thin water film. Such a nanosized film has recently been predicted to arise on th surface of melting ice as stabilized by repulsive Lifshitz forces. We show that different models for the effective polarizability of greenhouse gas molecules in water lead to different predictions for how Casimir--Polder forces influence the extraction of CH$_4$ and CO$_2$ molecules from the melting ice surface. In the most intricate model of a finite-sized molecule inside a cavity, dispersion potentials push the methane molecules towards the ice surface whereas the carbon dioxide typically will be attracted towards the closest interface (ice or air). Previous models for effective polarizability had suggested that CO$_2$ would also be pushed towards the ice surface. Release of greenhouse gas molecules from the surface of melting ice can potentially influence climate greenhouse effects. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.03505v1-abstract-full').style.display = 'none'; document.getElementById('1806.03505v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 May, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Chemistry Chemical Physics 2019 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1803.08411">arXiv:1803.08411</a> <span> [<a href="https://arxiv.org/pdf/1803.08411">pdf</a>, <a href="https://arxiv.org/format/1803.08411">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.jctc.8b00238">10.1021/acs.jctc.8b00238 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Charge transfer excitations with range separated functionals using improved virtual orbitals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=W%C3%BCrdemann%2C+R">Rolf W眉rdemann</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Michael Walter</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="1803.08411v1-abstract-short" style="display: inline;"> We present an implementation of range separated functionals utilizing the Slater-function on grids in real space in the projector augmented waves method. The screened Poisson equation is solved to evaluate the necessary screened exchange integrals on Cartesian grids. The implementation is verified against existing literature and applied to the description of charge transfer excitations. We find ve… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.08411v1-abstract-full').style.display = 'inline'; document.getElementById('1803.08411v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1803.08411v1-abstract-full" style="display: none;"> We present an implementation of range separated functionals utilizing the Slater-function on grids in real space in the projector augmented waves method. The screened Poisson equation is solved to evaluate the necessary screened exchange integrals on Cartesian grids. The implementation is verified against existing literature and applied to the description of charge transfer excitations. We find very slow convergence for calculations within linear response time-dependent density functional theory and unoccupied orbitals of the canonical Fock operator. Convergence can be severely improved by using Huzinaga's virtual orbitals instead. This combination furthermore enables an accurate determination of long-range charge transfer excitations by means of ground-state calculations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.08411v1-abstract-full').style.display = 'none'; document.getElementById('1803.08411v1-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 March, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">11 pages + 9 pages supporting information, 5 figures in main text, 3 figures in supporting information</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Chem. Theory Comput. 14 (2018) 3667-3676 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1711.01441">arXiv:1711.01441</a> <span> [<a href="https://arxiv.org/pdf/1711.01441">pdf</a>, <a href="https://arxiv.org/format/1711.01441">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="Physics Education">physics.ed-ph</span> </div> </div> <p class="title is-5 mathjax"> The International Cosmic Day - An Outreach Event for Astroparticle Physics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=H%C3%BCtten%2C+M">Moritz H眉tten</a>, <a href="/search/physics?searchtype=author&query=Karg%2C+T">Timo Karg</a>, <a href="/search/physics?searchtype=author&query=Schwerdt%2C+C">Carolin Schwerdt</a>, <a href="/search/physics?searchtype=author&query=Steppa%2C+C">Constantin Steppa</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Michael Walter</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="1711.01441v1-abstract-short" style="display: inline;"> The International Cosmic Day (ICD) is an astroparticle physics outreach event for high-school students and brings together students and different physics outreach projects from all over the world. Groups of scientists, teachers, and students meet for one day to learn about cosmic rays and perform an experiment with atmospheric muons. All participating groups investigate an identical question. The… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.01441v1-abstract-full').style.display = 'inline'; document.getElementById('1711.01441v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1711.01441v1-abstract-full" style="display: none;"> The International Cosmic Day (ICD) is an astroparticle physics outreach event for high-school students and brings together students and different physics outreach projects from all over the world. Groups of scientists, teachers, and students meet for one day to learn about cosmic rays and perform an experiment with atmospheric muons. All participating groups investigate an identical question. The students are enabled to work together like in an international collaboration, discussing their results in joint video conferences. Analyzing data, comparing and discussing with other "young scientists" gives the students a glimpse of how professional scientific research works. Scientists join the video conferences and give lectures to provide an insight in current astroparticle physics research. Several participating research experiments analyze big science data tailored to the questions addressed by the students and present their results on equal terms with the students. To create a lasting event, proceedings with measurement results of all participating groups are published. Every participant receives a personal e-mail with his certificate and the proceedings booklet. Organized by DESY in cooperation with Netzwerk Teilchenwelt, IPPOG, QuarkNet, Fermilab, and national partners like INFN, the ICD is a growing event with more and more popularity. We present the organization of the event and the experience from five years of ICD. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.01441v1-abstract-full').style.display = 'none'; document.getElementById('1711.01441v1-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> 4 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">presented at the 35th International Cosmic Ray Conference, Busan, July 2017</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> PoS(ICRC2017)405 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.04945">arXiv:1710.04945</a> <span> [<a href="https://arxiv.org/pdf/1710.04945">pdf</a>, <a href="https://arxiv.org/format/1710.04945">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.jpca.7b10159">10.1021/acs.jpca.7b10159 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Effective Polarisability Models </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fiedler%2C+J">Johannes Fiedler</a>, <a href="/search/physics?searchtype=author&query=Thiyam%2C+P">Priyadarshini Thiyam</a>, <a href="/search/physics?searchtype=author&query=Kurumbail%2C+A">Anurag Kurumbail</a>, <a href="/search/physics?searchtype=author&query=Burger%2C+F">Friedrich Burger</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Michael Walter</a>, <a href="/search/physics?searchtype=author&query=Persson%2C+C">Clas Persson</a>, <a href="/search/physics?searchtype=author&query=Brevik%2C+I">Iver Brevik</a>, <a href="/search/physics?searchtype=author&query=Parsons%2C+D+F">Drew F. Parsons</a>, <a href="/search/physics?searchtype=author&query=Bostr%C3%B6m%2C+M">Mathias Bostr枚m</a>, <a href="/search/physics?searchtype=author&query=Buhmann%2C+S+Y">Stefan Y. Buhmann</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="1710.04945v1-abstract-short" style="display: inline;"> Theories for the effective polarisability of a small particle in a medium are presented using different levels of approximation: we consider the virtual cavity, real cavity and the hard-sphere models as well as a continuous interpolation of the latter two. We present the respective hard-sphere and cavity radii as obtained from density-functional simulations as well as the resulting effective polar… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.04945v1-abstract-full').style.display = 'inline'; document.getElementById('1710.04945v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.04945v1-abstract-full" style="display: none;"> Theories for the effective polarisability of a small particle in a medium are presented using different levels of approximation: we consider the virtual cavity, real cavity and the hard-sphere models as well as a continuous interpolation of the latter two. We present the respective hard-sphere and cavity radii as obtained from density-functional simulations as well as the resulting effective polarisabilities at discrete Matsubara frequencies. This enables us to account for macroscopic media in van der Waals interactions between molecules in water and their Casimir-Polder interaction with an interface. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.04945v1-abstract-full').style.display = 'none'; document.getElementById('1710.04945v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1708.00226">arXiv:1708.00226</a> <span> [<a href="https://arxiv.org/pdf/1708.00226">pdf</a>, <a href="https://arxiv.org/format/1708.00226">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/10.1140/epjc/s10052-017-5499-9">10.1140/epjc/s10052-017-5499-9 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Mitigation of $^{42}$Ar/$^{42}$K background for the GERDA Phase II experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lubashevskiy%2C+A">A. Lubashevskiy</a>, <a href="/search/physics?searchtype=author&query=Agostini%2C+M">M. Agostini</a>, <a href="/search/physics?searchtype=author&query=Budj%C3%A1%C5%A1%2C+D">D. Budj谩拧</a>, <a href="/search/physics?searchtype=author&query=Gangapshev%2C+A">A. Gangapshev</a>, <a href="/search/physics?searchtype=author&query=Gusev%2C+K">K. Gusev</a>, <a href="/search/physics?searchtype=author&query=Heisel%2C+M">M. Heisel</a>, <a href="/search/physics?searchtype=author&query=Klimenko%2C+A">A. Klimenko</a>, <a href="/search/physics?searchtype=author&query=Lazzaro%2C+A">A. Lazzaro</a>, <a href="/search/physics?searchtype=author&query=Lehnert%2C+B">B. Lehnert</a>, <a href="/search/physics?searchtype=author&query=Pelczar%2C+K">K. Pelczar</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6nert%2C+S">S. Sch枚nert</a>, <a href="/search/physics?searchtype=author&query=Smolnikov%2C+A">A. Smolnikov</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">M. Walter</a>, <a href="/search/physics?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="1708.00226v1-abstract-short" style="display: inline;"> Background coming from the $^{42}$Ar decay chain is considered to be one of the most relevant for the GERDA experiment, which aims to search of the neutrinoless double beta decay of $^{76}$Ge. The sensitivity strongly relies on the absence of background around the Q-value of the decay. Background coming from $^{42}$K, a progeny of $^{42}$Ar, can contribute to that background via electrons from the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.00226v1-abstract-full').style.display = 'inline'; document.getElementById('1708.00226v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1708.00226v1-abstract-full" style="display: none;"> Background coming from the $^{42}$Ar decay chain is considered to be one of the most relevant for the GERDA experiment, which aims to search of the neutrinoless double beta decay of $^{76}$Ge. The sensitivity strongly relies on the absence of background around the Q-value of the decay. Background coming from $^{42}$K, a progeny of $^{42}$Ar, can contribute to that background via electrons from the continuous spectrum with an endpoint of 3.5 MeV. Research and development on the suppression methods targeting this source of background were performed at the low-background test facility LArGe. It was demonstrated that by reducing $^{42}$K ion collection on the surfaces of the broad energy germanium detectors in combination with pulse shape discrimination techniques and an argon scintillation veto, it is possible to suppress the $^{42}$K background by three orders of magnitude. This is sufficient for Phase II of the GERDA experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.00226v1-abstract-full').style.display = 'none'; document.getElementById('1708.00226v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 August, 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">Journal ref:</span> Eur. Phys. J. C (2018) 78: 15 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1703.00570">arXiv:1703.00570</a> <span> [<a href="https://arxiv.org/pdf/1703.00570">pdf</a>, <a href="https://arxiv.org/format/1703.00570">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/10.1038/nature21717">10.1038/nature21717 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Background free search for neutrinoless double beta decay with GERDA Phase II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Agostini%2C+M">M. Agostini</a>, <a href="/search/physics?searchtype=author&query=Allardt%2C+M">M. Allardt</a>, <a href="/search/physics?searchtype=author&query=Bakalyarov%2C+A+M">A. M. Bakalyarov</a>, <a href="/search/physics?searchtype=author&query=Balata%2C+M">M. Balata</a>, <a href="/search/physics?searchtype=author&query=Barabanov%2C+I">I. Barabanov</a>, <a href="/search/physics?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/physics?searchtype=author&query=Bauer%2C+C">C. Bauer</a>, <a href="/search/physics?searchtype=author&query=Bellotti%2C+E">E. Bellotti</a>, <a href="/search/physics?searchtype=author&query=Belogurov%2C+S">S. Belogurov</a>, <a href="/search/physics?searchtype=author&query=Belyaev%2C+S+T">S. T. Belyaev</a>, <a href="/search/physics?searchtype=author&query=Benato%2C+G">G. Benato</a>, <a href="/search/physics?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/physics?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/physics?searchtype=author&query=Bode%2C+T">T. Bode</a>, <a href="/search/physics?searchtype=author&query=Borowicz%2C+D">D. Borowicz</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Cattadori%2C+C">C. Cattadori</a>, <a href="/search/physics?searchtype=author&query=Chernogorov%2C+A">A. Chernogorov</a>, <a href="/search/physics?searchtype=author&query=D%27Andrea%2C+V">V. D'Andrea</a>, <a href="/search/physics?searchtype=author&query=Demidova%2C+E+V">E. V. Demidova</a>, <a href="/search/physics?searchtype=author&query=DiMarco%2C+N">N. DiMarco</a>, <a href="/search/physics?searchtype=author&query=diVacri%2C+A">A. diVacri</a>, <a href="/search/physics?searchtype=author&query=Domula%2C+A">A. Domula</a> , et al. (91 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="1703.00570v2-abstract-short" style="display: inline;"> The Standard Model of particle physics cannot explain the dominance of matter over anti-matter in our Universe. In many model extensions this is a very natural consequence of neutrinos being their own anti-particles (Majorana particles) which implies that a lepton number violating radioactive decay named neutrinoless double beta ($0谓尾尾$) decay should exist. The detection of this extremely rare hyp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1703.00570v2-abstract-full').style.display = 'inline'; document.getElementById('1703.00570v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1703.00570v2-abstract-full" style="display: none;"> The Standard Model of particle physics cannot explain the dominance of matter over anti-matter in our Universe. In many model extensions this is a very natural consequence of neutrinos being their own anti-particles (Majorana particles) which implies that a lepton number violating radioactive decay named neutrinoless double beta ($0谓尾尾$) decay should exist. The detection of this extremely rare hypothetical process requires utmost suppression of any kind of backgrounds. The GERDA collaboration searches for $0谓尾尾$ decay of $^{76}$Ge ($^{76}\rm{Ge} \rightarrow\,^{76}\rm{Se} + 2e^-$) by operating bare detectors made from germanium with enriched $^{76}$Ge fraction in liquid argon. Here, we report on first data of GERDA Phase II. A background level of $\approx10^{-3}$ cts/(keV$\cdot$kg$\cdot$yr) has been achieved which is the world-best if weighted by the narrow energy-signal region of germanium detectors. Combining Phase I and II data we find no signal and deduce a new lower limit for the half-life of $5.3\cdot10^{25}$ yr at 90 % C.L. Our sensitivity of $4.0\cdot10^{25}$ yr is competitive with the one of experiments with significantly larger isotope mass. GERDA is the first $0谓尾尾$ experiment that will be background-free up to its design exposure. This progress relies on a novel active veto system, the superior germanium detector energy resolution and the improved background recognition of our new detectors. The unique discovery potential of an essentially background-free search for $0谓尾尾$ decay motivates a larger germanium experiment with higher sensitivity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1703.00570v2-abstract-full').style.display = 'none'; document.getElementById('1703.00570v2-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 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 March, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">14 pages, 9 figures, 1 table; ; data, figures and images available at http://www.mpi-hd.mpg/gerda/public</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature, Volume 544, Number 7648, pp5-132 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1611.06884">arXiv:1611.06884</a> <span> [<a href="https://arxiv.org/pdf/1611.06884">pdf</a>, <a href="https://arxiv.org/format/1611.06884">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.2017.03.003">10.1016/j.astropartphys.2017.03.003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Limits on uranium and thorium bulk content in GERDA Phase I detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=GERDA+collaboration"> GERDA collaboration</a>, <a href="/search/physics?searchtype=author&query=Agostini%2C+M">M. Agostini</a>, <a href="/search/physics?searchtype=author&query=Allardt%2C+M">M. Allardt</a>, <a href="/search/physics?searchtype=author&query=Bakalyarov%2C+A+M">A. M. Bakalyarov</a>, <a href="/search/physics?searchtype=author&query=Balata%2C+M">M. Balata</a>, <a href="/search/physics?searchtype=author&query=Barabanov%2C+I">I. Barabanov</a>, <a href="/search/physics?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/physics?searchtype=author&query=Bauer%2C+C">C. Bauer</a>, <a href="/search/physics?searchtype=author&query=Becerici-Schmidt%2C+N">N. Becerici-Schmidt</a>, <a href="/search/physics?searchtype=author&query=Bellotti%2C+E">E. Bellotti</a>, <a href="/search/physics?searchtype=author&query=Belogurov%2C+S">S. Belogurov</a>, <a href="/search/physics?searchtype=author&query=Belyaev%2C+S+T">S. T. Belyaev</a>, <a href="/search/physics?searchtype=author&query=Benato%2C+G">G. Benato</a>, <a href="/search/physics?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/physics?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/physics?searchtype=author&query=Bode%2C+T">T. Bode</a>, <a href="/search/physics?searchtype=author&query=Borowicz%2C+D">D. Borowicz</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Cattadori%2C+C">C. Cattadori</a>, <a href="/search/physics?searchtype=author&query=Chernogorov%2C+A">A. Chernogorov</a>, <a href="/search/physics?searchtype=author&query=D%27Andrea%2C+V">V. D'Andrea</a>, <a href="/search/physics?searchtype=author&query=Demidova%2C+E+V">E. V. Demidova</a>, <a href="/search/physics?searchtype=author&query=di+Vacri%2C+A">A. di Vacri</a> , et al. (91 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="1611.06884v1-abstract-short" style="display: inline;"> Internal contaminations of $^{238}$U, $^{235}$U and $^{232}$Th in the bulk of high purity germanium detectors are potential backgrounds for experiments searching for neutrinoless double beta decay of $^{76}$Ge. The data from GERDA Phase~I have been analyzed for alpha events from the decay chain of these contaminations by looking for full decay chains and for time correlations between successive de… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.06884v1-abstract-full').style.display = 'inline'; document.getElementById('1611.06884v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1611.06884v1-abstract-full" style="display: none;"> Internal contaminations of $^{238}$U, $^{235}$U and $^{232}$Th in the bulk of high purity germanium detectors are potential backgrounds for experiments searching for neutrinoless double beta decay of $^{76}$Ge. The data from GERDA Phase~I have been analyzed for alpha events from the decay chain of these contaminations by looking for full decay chains and for time correlations between successive decays in the same detector. No candidate events for a full chain have been found. Upper limits on the activities in the range of a few nBq/kg for $^{226}$Ra, $^{227}$Ac and $^{228}$Th, the long-lived daughter nuclides of $^{238}$U, $^{235}$U and $^{232}$Th, respectively, have been derived. With these upper limits a background index in the energy region of interest from $^{226}$Ra and $^{228}$Th contamination is estimated which satisfies the prerequisites of a future ton scale germanium double beta decay experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.06884v1-abstract-full').style.display = 'none'; document.getElementById('1611.06884v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 November, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">2 figures, 7 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/1601.06007">arXiv:1601.06007</a> <span> [<a href="https://arxiv.org/pdf/1601.06007">pdf</a>, <a href="https://arxiv.org/format/1601.06007">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.astropartphys.2016.08.002">10.1016/j.astropartphys.2016.08.002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Flux Modulations seen by the Muon Veto of the GERDA Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Agostini%2C+M">M. Agostini</a>, <a href="/search/physics?searchtype=author&query=Allardt%2C+M">M. Allardt</a>, <a href="/search/physics?searchtype=author&query=Bakalyarov%2C+A+M">A. M. Bakalyarov</a>, <a href="/search/physics?searchtype=author&query=Balata%2C+M">M. Balata</a>, <a href="/search/physics?searchtype=author&query=Barabanov%2C+I">I. Barabanov</a>, <a href="/search/physics?searchtype=author&query=Barros%2C+N">N. Barros</a>, <a href="/search/physics?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/physics?searchtype=author&query=Bauer%2C+C">C. Bauer</a>, <a href="/search/physics?searchtype=author&query=Becerici-Schmidt%2C+N">N. Becerici-Schmidt</a>, <a href="/search/physics?searchtype=author&query=Bellotti%2C+E">E. Bellotti</a>, <a href="/search/physics?searchtype=author&query=Belogurov%2C+S">S. Belogurov</a>, <a href="/search/physics?searchtype=author&query=Belyaev%2C+S+T">S. T. Belyaev</a>, <a href="/search/physics?searchtype=author&query=Benato%2C+G">G. Benato</a>, <a href="/search/physics?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/physics?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/physics?searchtype=author&query=Bode%2C+T">T. Bode</a>, <a href="/search/physics?searchtype=author&query=Borowicz%2C+D">D. Borowicz</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Cattadori%2C+C">C. Cattadori</a>, <a href="/search/physics?searchtype=author&query=Chernogorov%2C+A">A. Chernogorov</a>, <a href="/search/physics?searchtype=author&query=D%27Andrea%2C+V">V. D'Andrea</a>, <a href="/search/physics?searchtype=author&query=Demidova%2C+E+V">E. V. Demidova</a>, <a href="/search/physics?searchtype=author&query=di+Vacri%2C+A">A. di Vacri</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="1601.06007v1-abstract-short" style="display: inline;"> The GERDA experiment at LNGS of INFN is equipped with an active muon veto. The main part of the system is a water Cherenkov veto with 66~PMTs in the water tank surrounding the GERDA cryostat. The muon flux recorded by this veto shows a seasonal modulation. Two effects have been identified which are caused by secondary muons from the CNGS neutrino beam (2.2 %) and a temperature modulation of the at… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.06007v1-abstract-full').style.display = 'inline'; document.getElementById('1601.06007v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1601.06007v1-abstract-full" style="display: none;"> The GERDA experiment at LNGS of INFN is equipped with an active muon veto. The main part of the system is a water Cherenkov veto with 66~PMTs in the water tank surrounding the GERDA cryostat. The muon flux recorded by this veto shows a seasonal modulation. Two effects have been identified which are caused by secondary muons from the CNGS neutrino beam (2.2 %) and a temperature modulation of the atmosphere (1.4 %). A mean cosmic muon rate of $I^0_渭 = (3.477 \pm 0.002_{\textrm{stat}} \pm 0.067_{\textrm{sys}}) \times 10^{-4}$/(s$\cdot$m$^2$) was found in good agreement with other experiments at LNGS at a depth of 3500~meter water equivalent. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.06007v1-abstract-full').style.display = 'none'; document.getElementById('1601.06007v1-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 January, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">7 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Astrop. Phys., 84 (2016) 29 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1509.07504">arXiv:1509.07504</a> <span> [<a href="https://arxiv.org/pdf/1509.07504">pdf</a>, <a href="https://arxiv.org/format/1509.07504">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Earth and Planetary Astrophysics">astro-ph.EP</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Geophysics">physics.geo-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/0004-637X/813/1/72">10.1088/0004-637X/813/1/72 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Compositional evolution during rocky protoplanet accretion </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Carter%2C+P+J">Philip J. Carter</a>, <a href="/search/physics?searchtype=author&query=Leinhardt%2C+Z+M">Zo毛 M. Leinhardt</a>, <a href="/search/physics?searchtype=author&query=Elliott%2C+T">Tim Elliott</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M+J">Michael J. Walter</a>, <a href="/search/physics?searchtype=author&query=Stewart%2C+S+T">Sarah T. Stewart</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="1509.07504v1-abstract-short" style="display: inline;"> The Earth appears non-chondritic in its abundances of refractory lithophile elements, posing a significant problem for our understanding of its formation and evolution. It has been suggested that this non-chondritic composition may be explained by collisional erosion of differentiated planetesimals of originally chondritic composition. In this work, we present N-body simulations of terrestrial pla… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.07504v1-abstract-full').style.display = 'inline'; document.getElementById('1509.07504v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.07504v1-abstract-full" style="display: none;"> The Earth appears non-chondritic in its abundances of refractory lithophile elements, posing a significant problem for our understanding of its formation and evolution. It has been suggested that this non-chondritic composition may be explained by collisional erosion of differentiated planetesimals of originally chondritic composition. In this work, we present N-body simulations of terrestrial planet formation that track the growth of planetary embryos from planetesimals. We simulate evolution through the runaway and oligarchic growth phases under the Grand Tack model and in the absence of giant planets. These simulations include a state-of-the-art collision model which allows multiple collision outcomes, such as accretion, erosion, and bouncing events, that enables tracking of the evolving core mass fraction of accreting planetesimals. We show that the embryos grown during this intermediate stage of planet formation exhibit a range of core mass fractions, and that with significant dynamical excitation, enough mantle can be stripped from growing embryos to account for the Earth's non-chondritic Fe/Mg ratio. We also find that there is a large diversity in the composition of remnant planetesimals, with both iron-rich and silicate-rich fragments produced via collisions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.07504v1-abstract-full').style.display = 'none'; document.getElementById('1509.07504v1-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 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">19 pages, 15 figures. Accepted for publication in ApJ. Accompanying animations can be found at http://www.star.bris.ac.uk/pcarter/comp_evo_15</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1508.05731">arXiv:1508.05731</a> <span> [<a href="https://arxiv.org/pdf/1508.05731">pdf</a>, <a href="https://arxiv.org/format/1508.05731">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> </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/10.1088/1748-0221/10/12/P12005">10.1088/1748-0221/10/12/P12005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Production and Characterization of 228Th Calibration Sources with Low Neutron Emission for GERDA </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baudis%2C+L">Laura Baudis</a>, <a href="/search/physics?searchtype=author&query=Benato%2C+G">Giovanni Benato</a>, <a href="/search/physics?searchtype=author&query=Carconi%2C+P">Pierluigi Carconi</a>, <a href="/search/physics?searchtype=author&query=Cattadori%2C+C+M">Carla Maria Cattadori</a>, <a href="/search/physics?searchtype=author&query=De+Felice%2C+P">Pierino De Felice</a>, <a href="/search/physics?searchtype=author&query=Eberhardt%2C+K">Klaus Eberhardt</a>, <a href="/search/physics?searchtype=author&query=Eichler%2C+R">Robert Eichler</a>, <a href="/search/physics?searchtype=author&query=Petrucci%2C+A">Andrea Petrucci</a>, <a href="/search/physics?searchtype=author&query=Tarka%2C+M">Michal Tarka</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Manuel Walter</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="1508.05731v1-abstract-short" style="display: inline;"> The GERDA experiment at the Laboratori Nazionali del Gran Sasso (LNGS) searches for the neutrinoless double beta decay of 76-Ge. In view of the GERDA Phase II data collection, four new 228-Th radioactive sources for the calibration of the germanium detectors enriched in 76-Ge have been produced with a new technique, leading to a reduced neutron flux from ( alpha; n ) reactions. The gamma activitie… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.05731v1-abstract-full').style.display = 'inline'; document.getElementById('1508.05731v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1508.05731v1-abstract-full" style="display: none;"> The GERDA experiment at the Laboratori Nazionali del Gran Sasso (LNGS) searches for the neutrinoless double beta decay of 76-Ge. In view of the GERDA Phase II data collection, four new 228-Th radioactive sources for the calibration of the germanium detectors enriched in 76-Ge have been produced with a new technique, leading to a reduced neutron flux from ( alpha; n ) reactions. The gamma activities of the sources were determined with a total uncertainty of 4 percent using an ultra-low background HPGe detector operated underground at LNGS. The emitted neutron flux was determined using a low background LiI(Eu) detector and a 3-He counter at LNGS. In both cases, a reduction of about one order of magnitude with respect to commercially available 228-Th sources was obtained. Additionally, a specific leak test with a sensitivity to leaks down to 10 mBq was developed to investigate the tightness of the stainless steel capsules housing the sources after their use in cryogenic environment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.05731v1-abstract-full').style.display = 'none'; document.getElementById('1508.05731v1-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, 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">14 pages, 5 figures, 3 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1504.07878">arXiv:1504.07878</a> <span> [<a href="https://arxiv.org/pdf/1504.07878">pdf</a>, <a href="https://arxiv.org/format/1504.07878">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 - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/10/08/P08002">10.1088/1748-0221/10/08/P08002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Scintillation efficiency of liquid argon in low energy neutron-argon scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Creus%2C+W">W. Creus</a>, <a href="/search/physics?searchtype=author&query=Allkofer%2C+Y">Y. Allkofer</a>, <a href="/search/physics?searchtype=author&query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&query=Ferella%2C+A+D">A. D. Ferella</a>, <a href="/search/physics?searchtype=author&query=Rochet%2C+J">J. Rochet</a>, <a href="/search/physics?searchtype=author&query=Scotto-Lavina%2C+L">L. Scotto-Lavina</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">M. Walter</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1504.07878v2-abstract-short" style="display: inline;"> Experiments searching for weak interacting massive particles with noble gases such as liquid argon require very low detection thresholds for nuclear recoils. A determination of the scintillation efficiency is crucial to quantify the response of the detector at low energy. We report the results obtained with a small liquid argon cell using a monoenergetic neutron beam produced by a deuterium-deuter… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.07878v2-abstract-full').style.display = 'inline'; document.getElementById('1504.07878v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1504.07878v2-abstract-full" style="display: none;"> Experiments searching for weak interacting massive particles with noble gases such as liquid argon require very low detection thresholds for nuclear recoils. A determination of the scintillation efficiency is crucial to quantify the response of the detector at low energy. We report the results obtained with a small liquid argon cell using a monoenergetic neutron beam produced by a deuterium-deuterium fusion source. The light yield relative to electrons was measured for six argon recoil energies between 11 and 120 keV at zero electric drift field. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.07878v2-abstract-full').style.display = 'none'; document.getElementById('1504.07878v2-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> 4 June, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">21 pages, 19 figures, 4 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.05349">arXiv:1503.05349</a> <span> [<a href="https://arxiv.org/pdf/1503.05349">pdf</a>, <a href="https://arxiv.org/format/1503.05349">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="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/10.1088/1748-0221/10/09/P09009">10.1088/1748-0221/10/09/P09009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Enhancement of Light Yield and Stability of Radio-Pure Tetraphenyl-Butadiene Based Coatings for VUV Light Detection in Cryogenic Environments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Baudis%2C+L">Laura Baudis</a>, <a href="/search/physics?searchtype=author&query=Benato%2C+G">Giovanni Benato</a>, <a href="/search/physics?searchtype=author&query=Dressler%2C+R">Rugard Dressler</a>, <a href="/search/physics?searchtype=author&query=Piastra%2C+F">Francesco Piastra</a>, <a href="/search/physics?searchtype=author&query=Usoltsev%2C+I">Ilya Usoltsev</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Manuel Walter</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="1503.05349v2-abstract-short" style="display: inline;"> The detection of VUV scintillation light, e.g. in (liquid) argon detectors, commonly includes a reflector with a fluorescent coating, converting UV photons to visible light. The light yield of these detectors depends directly on the conversion efficiency. Several coating/reflector combinations were produced using VM2000, a specular reflecting multi layer polymer, and Tetratex, a diffuse reflecting… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.05349v2-abstract-full').style.display = 'inline'; document.getElementById('1503.05349v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.05349v2-abstract-full" style="display: none;"> The detection of VUV scintillation light, e.g. in (liquid) argon detectors, commonly includes a reflector with a fluorescent coating, converting UV photons to visible light. The light yield of these detectors depends directly on the conversion efficiency. Several coating/reflector combinations were produced using VM2000, a specular reflecting multi layer polymer, and Tetratex, a diffuse reflecting PTFE fabric, as reflector foils. The light yield of these coatings was optimised and has been measured in a dedicated liquid argon setup built at the University of Zurich. It employs a small, 1.3 kg LAr cell viewed by a 3-inch, low radioactivity PMT of type R11065-10 from Hamamatsu. The cryogenic stability of these coatings was additionally studied. The optimum reflector/coating combination was found to be Tetratex dip coated with Tetraphenyl-butadiene with a thickness of 0.9 mg/cm$^2$ resulting in a 3.6 times higher light yield compared to uncoated VM2000. Its performance was stable in long term measurements, ran up to 100 days, in liquid argon. This coated reflector was further investigated concerning radioactive impurities found to be suitable for current and upcoming low-background experiments. Therefore it is used for the liquid argon veto in Phase II of the GERDA neutrinoless double beta decay experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.05349v2-abstract-full').style.display = 'none'; document.getElementById('1503.05349v2-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 June, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">17 pages, 10 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/1502.04392">arXiv:1502.04392</a> <span> [<a href="https://arxiv.org/pdf/1502.04392">pdf</a>, <a href="https://arxiv.org/format/1502.04392">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"> Improvement of the Energy Resolution via an Optimized Digital Signal Processing in GERDA Phase I </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Agostini%2C+M">M. Agostini</a>, <a href="/search/physics?searchtype=author&query=Allardt%2C+M">M. Allardt</a>, <a href="/search/physics?searchtype=author&query=Bakalyarov%2C+A+M">A. M. Bakalyarov</a>, <a href="/search/physics?searchtype=author&query=Balata%2C+M">M. Balata</a>, <a href="/search/physics?searchtype=author&query=Barabanov%2C+I">I. Barabanov</a>, <a href="/search/physics?searchtype=author&query=Barros%2C+N">N. Barros</a>, <a href="/search/physics?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/physics?searchtype=author&query=Bauer%2C+C">C. Bauer</a>, <a href="/search/physics?searchtype=author&query=Becerici-Schmidt%2C+N">N. Becerici-Schmidt</a>, <a href="/search/physics?searchtype=author&query=Bellotti%2C+E">E. Bellotti</a>, <a href="/search/physics?searchtype=author&query=Belogurov%2C+S">S. Belogurov</a>, <a href="/search/physics?searchtype=author&query=Belyaev%2C+S+T">S. T. Belyaev</a>, <a href="/search/physics?searchtype=author&query=Benato%2C+G">G. Benato</a>, <a href="/search/physics?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/physics?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/physics?searchtype=author&query=Bode%2C+T">T. Bode</a>, <a href="/search/physics?searchtype=author&query=Borowicz%2C+D">D. Borowicz</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/physics?searchtype=author&query=Budj%C3%A1%C5%A1%2C+D">D. Budj谩拧</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Cattadori%2C+C">C. Cattadori</a>, <a href="/search/physics?searchtype=author&query=Chernogorov%2C+A">A. Chernogorov</a>, <a href="/search/physics?searchtype=author&query=D%27Andrea%2C+V">V. D'Andrea</a>, <a href="/search/physics?searchtype=author&query=Demidova%2C+E+V">E. V. Demidova</a> , et al. (89 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="1502.04392v1-abstract-short" style="display: inline;"> An optimized digital shaping filter has been developed for the GERDA experiment which searches for neutrinoless double beta decay in 76Ge. The GERDA Phase I energy calibration data have been reprocessed and an average improvement of 0.3 keV in energy resolution (FWHM) at the 76Ge Q value for 0谓尾尾decay is obtained. This is possible thanks to the enhanced low-frequency noise rejection of this Zero A… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.04392v1-abstract-full').style.display = 'inline'; document.getElementById('1502.04392v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1502.04392v1-abstract-full" style="display: none;"> An optimized digital shaping filter has been developed for the GERDA experiment which searches for neutrinoless double beta decay in 76Ge. The GERDA Phase I energy calibration data have been reprocessed and an average improvement of 0.3 keV in energy resolution (FWHM) at the 76Ge Q value for 0谓尾尾decay is obtained. This is possible thanks to the enhanced low-frequency noise rejection of this Zero Area Cusp (ZAC) signal shaping fillter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.04392v1-abstract-full').style.display = 'none'; document.getElementById('1502.04392v1-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 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">12 pages, 16 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 75 (2015) 255 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1501.02345">arXiv:1501.02345</a> <span> [<a href="https://arxiv.org/pdf/1501.02345">pdf</a>, <a href="https://arxiv.org/format/1501.02345">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="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/s10052-015-3627-y">10.1140/epjc/s10052-015-3627-y <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Results on $尾尾$ decay with emission of two neutrinos or Majorons in $^{76}$Ge from GERDA Phase I </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Agostini%2C+M">M. Agostini</a>, <a href="/search/physics?searchtype=author&query=Allardt%2C+M">M. Allardt</a>, <a href="/search/physics?searchtype=author&query=Bakalyarov%2C+A+M">A. M. Bakalyarov</a>, <a href="/search/physics?searchtype=author&query=Balata%2C+M">M. Balata</a>, <a href="/search/physics?searchtype=author&query=Barabanov%2C+I">I. Barabanov</a>, <a href="/search/physics?searchtype=author&query=Barros%2C+N">N. Barros</a>, <a href="/search/physics?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/physics?searchtype=author&query=Bauer%2C+C">C. Bauer</a>, <a href="/search/physics?searchtype=author&query=Becerici-Schmidt%2C+N">N. Becerici-Schmidt</a>, <a href="/search/physics?searchtype=author&query=Bellotti%2C+E">E. Bellotti</a>, <a href="/search/physics?searchtype=author&query=Belogurov%2C+S">S. Belogurov</a>, <a href="/search/physics?searchtype=author&query=Belyaev%2C+S+T">S. T. Belyaev</a>, <a href="/search/physics?searchtype=author&query=Benato%2C+G">G. Benato</a>, <a href="/search/physics?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/physics?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/physics?searchtype=author&query=Bode%2C+T">T. Bode</a>, <a href="/search/physics?searchtype=author&query=Borowicz%2C+D">D. Borowicz</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/physics?searchtype=author&query=Budj%C3%A1%C5%A1%2C+D">D. Budj谩拧</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Cattadori%2C+C">C. Cattadori</a>, <a href="/search/physics?searchtype=author&query=Chernogorov%2C+A">A. Chernogorov</a>, <a href="/search/physics?searchtype=author&query=D%27Andrea%2C+V">V. D'Andrea</a>, <a href="/search/physics?searchtype=author&query=Demidova%2C+E+V">E. V. Demidova</a> , et al. (87 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="1501.02345v1-abstract-short" style="display: inline;"> A search for neutrinoless $尾尾$ decay processes accompanied with Majoron emission has been performed using data collected during Phase I of the GERmanium Detector Array (GERDA) experiment at the Laboratori Nazionali del Gran Sasso of INFN (Italy). Processes with spectral indices n = 1, 2, 3, 7 were searched for. No signals were found and lower limits of the order of 10$^{23}$ yr on their half-lives… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.02345v1-abstract-full').style.display = 'inline'; document.getElementById('1501.02345v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1501.02345v1-abstract-full" style="display: none;"> A search for neutrinoless $尾尾$ decay processes accompanied with Majoron emission has been performed using data collected during Phase I of the GERmanium Detector Array (GERDA) experiment at the Laboratori Nazionali del Gran Sasso of INFN (Italy). Processes with spectral indices n = 1, 2, 3, 7 were searched for. No signals were found and lower limits of the order of 10$^{23}$ yr on their half-lives were derived, yielding substantially improved results compared to previous experiments with $^{76}$Ge. A new result for the half-life of the neutrino-accompanied $尾尾$ decay of $^{76}$Ge with significantly reduced uncertainties is also given, resulting in $T^{2谓}_{1/2} = (1.926 \pm 0.095)\cdot10^{21}$ yr. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1501.02345v1-abstract-full').style.display = 'none'; document.getElementById('1501.02345v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">3 Figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 75 (2015) 416 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1410.3421">arXiv:1410.3421</a> <span> [<a href="https://arxiv.org/pdf/1410.3421">pdf</a>, <a href="https://arxiv.org/format/1410.3421">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Earth and Planetary Astrophysics">astro-ph.EP</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Geophysics">physics.geo-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.icarus.2014.10.019">10.1016/j.icarus.2014.10.019 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Collisional Origin to Earth's Non-chondritic Composition? </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bonsor%2C+A">Amy Bonsor</a>, <a href="/search/physics?searchtype=author&query=Leinhardt%2C+Z+M">Zo毛 M. Leinhardt</a>, <a href="/search/physics?searchtype=author&query=Carter%2C+P+J">Philip J. Carter</a>, <a href="/search/physics?searchtype=author&query=Elliott%2C+T">Tim Elliott</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M+J">Michael J. Walter</a>, <a href="/search/physics?searchtype=author&query=Stewart%2C+S+T">Sarah T. Stewart</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="1410.3421v1-abstract-short" style="display: inline;"> Several lines of evidence indicate a non-chondritic composition for Bulk Earth. If Earth formed from the accretion of chondritic material, its non-chondritic composition, in particular the super-chondritic 142Nd/144Nd and low Mg/Fe ratios, might be explained by the collisional erosion of differentiated planetesimals during its formation. In this work we use an N-body code, that includes a state-of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1410.3421v1-abstract-full').style.display = 'inline'; document.getElementById('1410.3421v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1410.3421v1-abstract-full" style="display: none;"> Several lines of evidence indicate a non-chondritic composition for Bulk Earth. If Earth formed from the accretion of chondritic material, its non-chondritic composition, in particular the super-chondritic 142Nd/144Nd and low Mg/Fe ratios, might be explained by the collisional erosion of differentiated planetesimals during its formation. In this work we use an N-body code, that includes a state-of-the-art collision model, to follow the formation of protoplanets, similar to proto-Earth, from differentiated planetesimals (> 100 km) up to isolation mass (> 0.16 M_Earth). Collisions between differentiated bodies have the potential to change the core-mantle ratio of the accreted protoplanets. We show that sufficient mantle material can be stripped from the colliding bodies during runaway and oligarchic growth, such that the final protoplanets could have Mg/Fe and Si/Fe ratios similar to that of bulk Earth, but only if Earth is an extreme case and the core is assumed to contain 10% silicon by mass. This may indicate an important role for collisional differentiation during the giant impact phase if Earth formed from chondritic material. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1410.3421v1-abstract-full').style.display = 'none'; document.getElementById('1410.3421v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 October, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">14 pages, 9 figures, accepted for publication in Icarus</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1410.0853">arXiv:1410.0853</a> <span> [<a href="https://arxiv.org/pdf/1410.0853">pdf</a>, <a href="https://arxiv.org/format/1410.0853">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/10.1140/epjc/s10052-014-3253-0">10.1140/epjc/s10052-014-3253-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Production, characterization and operation of $^{76}$Ge enriched BEGe detectors in GERDA </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Agostini%2C+M">M. Agostini</a>, <a href="/search/physics?searchtype=author&query=Allardt%2C+M">M. Allardt</a>, <a href="/search/physics?searchtype=author&query=Andreotti%2C+E">E. Andreotti</a>, <a href="/search/physics?searchtype=author&query=Bakalyarov%2C+A+M">A. M. Bakalyarov</a>, <a href="/search/physics?searchtype=author&query=Balata%2C+M">M. Balata</a>, <a href="/search/physics?searchtype=author&query=Barabanov%2C+I">I. Barabanov</a>, <a href="/search/physics?searchtype=author&query=Barros%2C+N">N. Barros</a>, <a href="/search/physics?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/physics?searchtype=author&query=Bauer%2C+C">C. Bauer</a>, <a href="/search/physics?searchtype=author&query=Becerici-Schmidt%2C+N">N. Becerici-Schmidt</a>, <a href="/search/physics?searchtype=author&query=Bellotti%2C+E">E. Bellotti</a>, <a href="/search/physics?searchtype=author&query=Belogurov%2C+S">S. Belogurov</a>, <a href="/search/physics?searchtype=author&query=Belyaev%2C+S+T">S. T. Belyaev</a>, <a href="/search/physics?searchtype=author&query=Benato%2C+G">G. Benato</a>, <a href="/search/physics?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/physics?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/physics?searchtype=author&query=Bode%2C+T">T. Bode</a>, <a href="/search/physics?searchtype=author&query=Borowicz%2C+D">D. Borowicz</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/physics?searchtype=author&query=Budjas%2C+D">D. Budjas</a>, <a href="/search/physics?searchtype=author&query=Caldwel%2C+A">A. Caldwel</a>, <a href="/search/physics?searchtype=author&query=Cattadori%2C+C">C. Cattadori</a>, <a href="/search/physics?searchtype=author&query=Chernogorov%2C+A">A. Chernogorov</a>, <a href="/search/physics?searchtype=author&query=D%27Andrea%2C+V">V. D'Andrea</a> , et al. (87 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="1410.0853v1-abstract-short" style="display: inline;"> The GERmanium Detector Array (GERDA) at the Gran Sasso Underground Laboratory (LNGS) searches for the neutrinoless double beta decay (0谓尾尾) of $^{76}$Ge. Germanium detectors made of material with an enriched $^{76}$Ge fraction act simultaneously as sources and detectors for this decay. During Phase I of the experiment mainly refurbished semi-coaxial Ge detectors from former experiments were used… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1410.0853v1-abstract-full').style.display = 'inline'; document.getElementById('1410.0853v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1410.0853v1-abstract-full" style="display: none;"> The GERmanium Detector Array (GERDA) at the Gran Sasso Underground Laboratory (LNGS) searches for the neutrinoless double beta decay (0谓尾尾) of $^{76}$Ge. Germanium detectors made of material with an enriched $^{76}$Ge fraction act simultaneously as sources and detectors for this decay. During Phase I of the experiment mainly refurbished semi-coaxial Ge detectors from former experiments were used. For the upcoming Phase II, 30 new $^{76}$Ge enriched detectors of broad energy germanium (BEGe)-type were produced. A subgroup of these detectors has already been deployed in GERDA during Phase I. The present paper reviews the complete production chain of these BEGe detectors including isotopic enrichment, purification, crystal growth and diode production. The efforts in optimizing the mass yield and in minimizing the exposure of the $^{76}$Ge enriched germanium to cosmic radiation during processing are described. Furthermore, characterization measurements in vacuum cryostats of the first subgroup of seven BEGe detectors and their long-term behavior in liquid argon are discussed. The detector performance fulfills the requirements needed for the physics goals of GERDA Phase~II. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1410.0853v1-abstract-full').style.display = 'none'; document.getElementById('1410.0853v1-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 October, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">23 pages, 21 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 75 (2015) 39 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1401.6911">arXiv:1401.6911</a> <span> [<a href="https://arxiv.org/pdf/1401.6911">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Earth and Planetary Astrophysics">astro-ph.EP</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Geophysics">physics.geo-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.precamres.2006.08.014">10.1016/j.precamres.2006.08.014 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Hydrothermal alteration at the Panorama Formation, North Pole Dome, Pilbara Craton, Western Australia </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Brown%2C+A+J">Adrian J. Brown</a>, <a href="/search/physics?searchtype=author&query=Cudahy%2C+T+J">Thomas J. Cudahy</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M+R">Malcolm R. Walter</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="1401.6911v1-abstract-short" style="display: inline;"> An airborne hyperspectral remote sensing dataset was obtained of the North Pole Dome region of the Pilbara Craton in October 2002. It has been analyzed for indications of hydrothermal minerals. Here we report on the identification and mapping of hydrothermal minerals in the 3.459 Ga Panorama Formation and surrounding strata. The spatial distribution of a pattern of subvertical pyrophyllite rich ve… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.6911v1-abstract-full').style.display = 'inline'; document.getElementById('1401.6911v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1401.6911v1-abstract-full" style="display: none;"> An airborne hyperspectral remote sensing dataset was obtained of the North Pole Dome region of the Pilbara Craton in October 2002. It has been analyzed for indications of hydrothermal minerals. Here we report on the identification and mapping of hydrothermal minerals in the 3.459 Ga Panorama Formation and surrounding strata. The spatial distribution of a pattern of subvertical pyrophyllite rich veins connected to a pyrophyllite rich palaeohorizontal layer is interpreted to represent the base of an acid-sulfate epithermal system that is unconformably overlain by the stromatolitic 3.42 Ga Strelley Pool Chert. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.6911v1-abstract-full').style.display = 'none'; document.getElementById('1401.6911v1-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 January, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">29 pages, 9 figures, 2 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Precambrian Research (2006) 151, 211-223 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1309.3391">arXiv:1309.3391</a> <span> [<a href="https://arxiv.org/pdf/1309.3391">pdf</a>, <a href="https://arxiv.org/format/1309.3391">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="Physics Education">physics.ed-ph</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"> CosMO - A Cosmic Muon Observer Experiment for Students </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Franke%2C+R">R. Franke</a>, <a href="/search/physics?searchtype=author&query=Holler%2C+M">M. Holler</a>, <a href="/search/physics?searchtype=author&query=Kaminsky%2C+B">B. Kaminsky</a>, <a href="/search/physics?searchtype=author&query=Karg%2C+T">T. Karg</a>, <a href="/search/physics?searchtype=author&query=Prokoph%2C+H">H. Prokoph</a>, <a href="/search/physics?searchtype=author&query=Sch%C3%B6nwald%2C+A">A. Sch枚nwald</a>, <a href="/search/physics?searchtype=author&query=Schwerdt%2C+C">C. Schwerdt</a>, <a href="/search/physics?searchtype=author&query=St%C3%B6%C3%9Fl%2C+A">A. St枚脽l</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">M. Walter</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="1309.3391v1-abstract-short" style="display: inline;"> What are cosmic particles and where do they come from? These are questions which are not only fascinating for scientists in astrophysics. With the CosMO experiment (Cosmic Muon Observer) students can autonomously study these particles. They can perform their own hands-on experiments to become familiar with modern scientific working methods and to obtain a direct insight into astroparticle physics.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.3391v1-abstract-full').style.display = 'inline'; document.getElementById('1309.3391v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1309.3391v1-abstract-full" style="display: none;"> What are cosmic particles and where do they come from? These are questions which are not only fascinating for scientists in astrophysics. With the CosMO experiment (Cosmic Muon Observer) students can autonomously study these particles. They can perform their own hands-on experiments to become familiar with modern scientific working methods and to obtain a direct insight into astroparticle physics. In this contribution we present the experimental setup and possible measurements. The detector consists of three scintillator boxes. Events are triggered and read out by a data acquisition board developed for the QuarkNet Project. With a Python program running on a netbook under Linux, the trigger and data taking conditions can be defined. The program displays the particle rates in real-time and stores the data for offline analysis. Possible student experiments are the measurement of cosmic particle rates dependent on the zenith angle, the distribution of geometrical size of particle showers, and the lifetime of muons. Twenty CosMO detectors have been built at DESY. They are used within the German outreach network Netzwerk Teilchenwelt at 15 astroparticle-research institutes and universities for project work with students. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.3391v1-abstract-full').style.display = 'none'; document.getElementById('1309.3391v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 September, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">4 pages, 5 figures, presented at the 33rd International Cosmic Ray Conference, Rio de Janeiro, July 2013</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1307.2610">arXiv:1307.2610</a> <span> [<a href="https://arxiv.org/pdf/1307.2610">pdf</a>, <a href="https://arxiv.org/format/1307.2610">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/10.1140/epjc/s10052-013-2583-7">10.1140/epjc/s10052-013-2583-7 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pulse shape discrimination for GERDA Phase I data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Agostini%2C+M">M. Agostini</a>, <a href="/search/physics?searchtype=author&query=Allardt%2C+M">M. Allardt</a>, <a href="/search/physics?searchtype=author&query=Andreotti%2C+E">E. Andreotti</a>, <a href="/search/physics?searchtype=author&query=Bakalyarov%2C+A+M">A. M. Bakalyarov</a>, <a href="/search/physics?searchtype=author&query=Balata%2C+M">M. Balata</a>, <a href="/search/physics?searchtype=author&query=Barabanov%2C+I">I. Barabanov</a>, <a href="/search/physics?searchtype=author&query=Heider%2C+M+B">M. Barnabe Heider</a>, <a href="/search/physics?searchtype=author&query=Barros%2C+N">N. Barros</a>, <a href="/search/physics?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/physics?searchtype=author&query=Bauer%2C+C">C. Bauer</a>, <a href="/search/physics?searchtype=author&query=Becerici-Schmidt%2C+N">N. Becerici-Schmidt</a>, <a href="/search/physics?searchtype=author&query=Bellotti%2C+E">E. Bellotti</a>, <a href="/search/physics?searchtype=author&query=Belogurov%2C+S">S. Belogurov</a>, <a href="/search/physics?searchtype=author&query=Belyaev%2C+S+T">S. T. Belyaev</a>, <a href="/search/physics?searchtype=author&query=Benato%2C+G">G. Benato</a>, <a href="/search/physics?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/physics?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/physics?searchtype=author&query=Bode%2C+T">T. Bode</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/physics?searchtype=author&query=Budj%C3%A1%C5%A1%2C+D">D. Budj谩拧</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Cattadori%2C+C">C. Cattadori</a>, <a href="/search/physics?searchtype=author&query=Chernogorov%2C+A">A. Chernogorov</a>, <a href="/search/physics?searchtype=author&query=Cossavella%2C+F">F. Cossavella</a> , et al. (89 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="1307.2610v1-abstract-short" style="display: inline;"> The GERDA experiment located at the LNGS searches for neutrinoless double beta (0谓尾尾) decay of ^{76}Ge using germanium diodes as source and detector. In Phase I of the experiment eight semi-coaxial and five BEGe type detectors have been deployed. The latter type is used in this field of research for the first time. All detectors are made from material with enriched ^{76}Ge fraction. The experiment… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.2610v1-abstract-full').style.display = 'inline'; document.getElementById('1307.2610v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1307.2610v1-abstract-full" style="display: none;"> The GERDA experiment located at the LNGS searches for neutrinoless double beta (0谓尾尾) decay of ^{76}Ge using germanium diodes as source and detector. In Phase I of the experiment eight semi-coaxial and five BEGe type detectors have been deployed. The latter type is used in this field of research for the first time. All detectors are made from material with enriched ^{76}Ge fraction. The experimental sensitivity can be improved by analyzing the pulse shape of the detector signals with the aim to reject background events. This paper documents the algorithms developed before the data of Phase I were unblinded. The double escape peak (DEP) and Compton edge events of 2.615 MeV 纬 rays from ^{208}Tl decays as well as 2谓尾尾 decays of ^{76}Ge are used as proxies for 0谓尾尾 decay. For BEGe detectors the chosen selection is based on a single pulse shape parameter. It accepts 0.92$\pm$0.02 of signal-like events while about 80% of the background events at Q_{尾尾}=2039 keV are rejected. For semi-coaxial detectors three analyses are developed. The one based on an artificial neural network is used for the search of 0谓尾尾 decay. It retains 90% of DEP events and rejects about half of the events around Q_{尾尾}. The 2谓尾尾 events have an efficiency of 0.85\pm0.02 and the one for 0谓尾尾 decays is estimated to be 0.90^{+0.05}_{-0.09}. A second analysis uses a likelihood approach trained on Compton edge events. The third approach uses two pulse shape parameters. The latter two methods confirm the classification of the neural network since about 90% of the data events rejected by the neural network are also removed by both of them. In general, the selection efficiency extracted from DEP events agrees well with those determined from Compton edge events or from 2谓尾尾 decays. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.2610v1-abstract-full').style.display = 'none'; document.getElementById('1307.2610v1-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 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">18 pages, 27 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 73 (2013) 2583 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1306.5084">arXiv:1306.5084</a> <span> [<a href="https://arxiv.org/pdf/1306.5084">pdf</a>, <a href="https://arxiv.org/format/1306.5084">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-014-2764-z">10.1140/epjc/s10052-014-2764-z <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The background in the neutrinoless double beta decay experiment GERDA </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=The+GERDA+collaboration"> The GERDA collaboration</a>, <a href="/search/physics?searchtype=author&query=Agostini%2C+M">M. Agostini</a>, <a href="/search/physics?searchtype=author&query=Allardt%2C+M">M. Allardt</a>, <a href="/search/physics?searchtype=author&query=Andreotti%2C+E">E. Andreotti</a>, <a href="/search/physics?searchtype=author&query=Bakalyarov%2C+A+M">A. M. Bakalyarov</a>, <a href="/search/physics?searchtype=author&query=Balata%2C+M">M. Balata</a>, <a href="/search/physics?searchtype=author&query=Barabanov%2C+I">I. Barabanov</a>, <a href="/search/physics?searchtype=author&query=Heider%2C+M+B">M. Barnabe Heider</a>, <a href="/search/physics?searchtype=author&query=Barros%2C+N">N. Barros</a>, <a href="/search/physics?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/physics?searchtype=author&query=Bauer%2C+C">C. Bauer</a>, <a href="/search/physics?searchtype=author&query=Becerici-Schmidt%2C+N">N. Becerici-Schmidt</a>, <a href="/search/physics?searchtype=author&query=Bellotti%2C+E">E. Bellotti</a>, <a href="/search/physics?searchtype=author&query=Belogurov%2C+S">S. Belogurov</a>, <a href="/search/physics?searchtype=author&query=Belyaev%2C+S+T">S. T. Belyaev</a>, <a href="/search/physics?searchtype=author&query=Benato%2C+G">G. Benato</a>, <a href="/search/physics?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/physics?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/physics?searchtype=author&query=Bode%2C+T">T. Bode</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/physics?searchtype=author&query=Budjas%2C+D">D. Budjas</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/physics?searchtype=author&query=Cattadori%2C+C">C. Cattadori</a>, <a href="/search/physics?searchtype=author&query=Chernogorov%2C+A">A. Chernogorov</a> , et al. (89 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="1306.5084v2-abstract-short" style="display: inline;"> The GERmanium Detector Array (GERDA) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double beta decay of 76Ge. The signature of the signal is a monoenergetic peak at 2039 keV, the Q-value of the decay, Q_bb. To avoid bias in the signal search, the present analysis does not consider all those events, that fall in a 40 keV wide region centered around… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1306.5084v2-abstract-full').style.display = 'inline'; document.getElementById('1306.5084v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1306.5084v2-abstract-full" style="display: none;"> The GERmanium Detector Array (GERDA) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double beta decay of 76Ge. The signature of the signal is a monoenergetic peak at 2039 keV, the Q-value of the decay, Q_bb. To avoid bias in the signal search, the present analysis does not consider all those events, that fall in a 40 keV wide region centered around Q_bb. The main parameters needed for the neutrinoless double beta decay analysis are described. A background model was developed to describe the observed energy spectrum. The model contains several contributions, that are expected on the basis of material screening or that are established by the observation of characteristic structures in the energy spectrum. The model predicts a flat energy spectrum for the blinding window around Q_bb with a background index ranging from 17.6 to 23.8*10^{-3} counts/(keV kg yr). A part of the data not considered before has been used to test if the predictions of the background model are consistent. The observed number of events in this energy region is consistent with the background model. The background at Q-bb is dominated by close sources, mainly due to 42K, 214Bi, 228Th, 60Co and alpha emitting isotopes from the 226Ra decay chain. The individual fractions depend on the assumed locations of the contaminants. It is shown, that after removal of the known gamma peaks, the energy spectrum can be fitted in an energy range of 200 kev around Q_bb with a constant background. This gives a background index consistent with the full model and uncertainties of the same size. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1306.5084v2-abstract-full').style.display = 'none'; document.getElementById('1306.5084v2-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 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 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">Journal ref:</span> Eur. Phys. J. C 74 (2014) 2764 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1212.4067">arXiv:1212.4067</a> <span> [<a href="https://arxiv.org/pdf/1212.4067">pdf</a>, <a href="https://arxiv.org/format/1212.4067">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/10.1140/epjc/s10052-013-2330-0">10.1140/epjc/s10052-013-2330-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The GERDA experiment for the search of 0谓尾尾 decay in ^{76}Ge </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=GERDA+Collaboration"> GERDA Collaboration</a>, <a href="/search/physics?searchtype=author&query=Ackermann%2C+K+-">K. -H. Ackermann</a>, <a href="/search/physics?searchtype=author&query=Agostini%2C+M">M. Agostini</a>, <a href="/search/physics?searchtype=author&query=Allardt%2C+M">M. Allardt</a>, <a href="/search/physics?searchtype=author&query=Altmann%2C+M">M. Altmann</a>, <a href="/search/physics?searchtype=author&query=Andreotti%2C+E">E. Andreotti</a>, <a href="/search/physics?searchtype=author&query=Bakalyarov%2C+A+M">A. M. Bakalyarov</a>, <a href="/search/physics?searchtype=author&query=Balata%2C+M">M. Balata</a>, <a href="/search/physics?searchtype=author&query=Barabanov%2C+I">I. Barabanov</a>, <a href="/search/physics?searchtype=author&query=Heider%2C+M+B">M. Barnabe Heider</a>, <a href="/search/physics?searchtype=author&query=Barros%2C+N">N. Barros</a>, <a href="/search/physics?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/physics?searchtype=author&query=Bauer%2C+C">C. Bauer</a>, <a href="/search/physics?searchtype=author&query=Becerici-Schmidt%2C+N">N. Becerici-Schmidt</a>, <a href="/search/physics?searchtype=author&query=Bellotti%2C+E">E. Bellotti</a>, <a href="/search/physics?searchtype=author&query=Belogurov%2C+S">S. Belogurov</a>, <a href="/search/physics?searchtype=author&query=Belyaev%2C+S+T">S. T. Belyaev</a>, <a href="/search/physics?searchtype=author&query=Benato%2C+G">G. Benato</a>, <a href="/search/physics?searchtype=author&query=Bettini%2C+A">A. Bettini</a>, <a href="/search/physics?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/physics?searchtype=author&query=Bode%2C+T">T. Bode</a>, <a href="/search/physics?searchtype=author&query=Brudanin%2C+V">V. Brudanin</a>, <a href="/search/physics?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/physics?searchtype=author&query=Budjas%2C+D">D. Budjas</a>, <a href="/search/physics?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a> , et al. (114 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="1212.4067v1-abstract-short" style="display: inline;"> The GERDA collaboration is performing a search for neutrinoless double beta decay of ^{76}Ge with the eponymous detector. The experiment has been installed and commissioned at the Laboratori Nazionali del Gran Sasso and has started operation in November 2011. The design, construction and first operational results are described, along with detailed information from the R&D phase. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1212.4067v1-abstract-full" style="display: none;"> The GERDA collaboration is performing a search for neutrinoless double beta decay of ^{76}Ge with the eponymous detector. The experiment has been installed and commissioned at the Laboratori Nazionali del Gran Sasso and has started operation in November 2011. The design, construction and first operational results are described, along with detailed information from the R&D phase. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1212.4067v1-abstract-full').style.display = 'none'; document.getElementById('1212.4067v1-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 December, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">31 pages, 23 figures, submitted to EPJC</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 73 (2013) 2330 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1208.3430">arXiv:1208.3430</a> <span> [<a href="https://arxiv.org/pdf/1208.3430">pdf</a>, <a href="https://arxiv.org/ps/1208.3430">ps</a>, <a href="https://arxiv.org/format/1208.3430">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</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="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2012.11.081">10.1016/j.nima.2012.11.081 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> An improved method for measuring muon energy using the truncated mean of dE/dx </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=IceCube+collaboration"> IceCube collaboration</a>, <a href="/search/physics?searchtype=author&query=Abbasi%2C+R">R. Abbasi</a>, <a href="/search/physics?searchtype=author&query=Abdou%2C+Y">Y. Abdou</a>, <a href="/search/physics?searchtype=author&query=Ackermann%2C+M">M. Ackermann</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+J">J. Adams</a>, <a href="/search/physics?searchtype=author&query=Aguilar%2C+J+A">J. A. Aguilar</a>, <a href="/search/physics?searchtype=author&query=Ahlers%2C+M">M. Ahlers</a>, <a href="/search/physics?searchtype=author&query=Altmann%2C+D">D. Altmann</a>, <a href="/search/physics?searchtype=author&query=Andeen%2C+K">K. Andeen</a>, <a href="/search/physics?searchtype=author&query=Auffenberg%2C+J">J. Auffenberg</a>, <a href="/search/physics?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/physics?searchtype=author&query=Baker%2C+M">M. Baker</a>, <a href="/search/physics?searchtype=author&query=Barwick%2C+S+W">S. W. Barwick</a>, <a href="/search/physics?searchtype=author&query=Baum%2C+V">V. Baum</a>, <a href="/search/physics?searchtype=author&query=Bay%2C+R">R. Bay</a>, <a href="/search/physics?searchtype=author&query=Beattie%2C+K">K. Beattie</a>, <a href="/search/physics?searchtype=author&query=Beatty%2C+J+J">J. J. Beatty</a>, <a href="/search/physics?searchtype=author&query=Bechet%2C+S">S. Bechet</a>, <a href="/search/physics?searchtype=author&query=Tjus%2C+J+B">J. Becker Tjus</a>, <a href="/search/physics?searchtype=author&query=Becker%2C+K+-">K. -H. Becker</a>, <a href="/search/physics?searchtype=author&query=Bell%2C+M">M. Bell</a>, <a href="/search/physics?searchtype=author&query=Benabderrahmane%2C+M+L">M. L. Benabderrahmane</a>, <a href="/search/physics?searchtype=author&query=BenZvi%2C+S">S. BenZvi</a>, <a href="/search/physics?searchtype=author&query=Berdermann%2C+J">J. Berdermann</a>, <a href="/search/physics?searchtype=author&query=Berghaus%2C+P">P. Berghaus</a> , et al. (255 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="1208.3430v2-abstract-short" style="display: inline;"> The measurement of muon energy is critical for many analyses in large Cherenkov detectors, particularly those that involve separating extraterrestrial neutrinos from the atmospheric neutrino background. Muon energy has traditionally been determined by measuring the specific energy loss (dE/dx) along the muon's path and relating the dE/dx to the muon energy. Because high-energy muons (E_mu > 1 TeV)… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1208.3430v2-abstract-full').style.display = 'inline'; document.getElementById('1208.3430v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1208.3430v2-abstract-full" style="display: none;"> The measurement of muon energy is critical for many analyses in large Cherenkov detectors, particularly those that involve separating extraterrestrial neutrinos from the atmospheric neutrino background. Muon energy has traditionally been determined by measuring the specific energy loss (dE/dx) along the muon's path and relating the dE/dx to the muon energy. Because high-energy muons (E_mu > 1 TeV) lose energy randomly, the spread in dE/dx values is quite large, leading to a typical energy resolution of 0.29 in log10(E_mu) for a muon observed over a 1 km path length in the IceCube detector. In this paper, we present an improved method that uses a truncated mean and other techniques to determine the muon energy. The muon track is divided into separate segments with individual dE/dx values. The elimination of segments with the highest dE/dx results in an overall dE/dx that is more closely correlated to the muon energy. This method results in an energy resolution of 0.22 in log10(E_mu), which gives a 26% improvement. This technique is applicable to any large water or ice detector and potentially to large scintillator or liquid argon detectors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1208.3430v2-abstract-full').style.display = 'none'; document.getElementById('1208.3430v2-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 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 August, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">12 pages, 16 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> NIM A703:190,2013 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1207.0810">arXiv:1207.0810</a> <span> [<a href="https://arxiv.org/pdf/1207.0810">pdf</a>, <a href="https://arxiv.org/format/1207.0810">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 - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</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="Data Analysis, Statistics and Probability">physics.data-an</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/10.1088/1475-7516/2012/11/057">10.1088/1475-7516/2012/11/057 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Use of event-level neutrino telescope data in global fits for theories of new physics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Scott%2C+P">P. Scott</a>, <a href="/search/physics?searchtype=author&query=Savage%2C+C">C. Savage</a>, <a href="/search/physics?searchtype=author&query=Edsj%C3%B6%2C+J">J. Edsj枚</a>, <a href="/search/physics?searchtype=author&query=Collaboration%2C+t+I">the IceCube Collaboration</a>, <a href="/search/physics?searchtype=author&query=%3A"> :</a>, <a href="/search/physics?searchtype=author&query=Abbasi%2C+R">R. Abbasi</a>, <a href="/search/physics?searchtype=author&query=Abdou%2C+Y">Y. Abdou</a>, <a href="/search/physics?searchtype=author&query=Ackermann%2C+M">M. Ackermann</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+J">J. Adams</a>, <a href="/search/physics?searchtype=author&query=Aguilar%2C+J+A">J. A. Aguilar</a>, <a href="/search/physics?searchtype=author&query=Ahlers%2C+M">M. Ahlers</a>, <a href="/search/physics?searchtype=author&query=Altmann%2C+D">D. Altmann</a>, <a href="/search/physics?searchtype=author&query=Andeen%2C+K">K. Andeen</a>, <a href="/search/physics?searchtype=author&query=Auffenberg%2C+J">J. Auffenberg</a>, <a href="/search/physics?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/physics?searchtype=author&query=Baker%2C+M">M. Baker</a>, <a href="/search/physics?searchtype=author&query=Barwick%2C+S+W">S. W. Barwick</a>, <a href="/search/physics?searchtype=author&query=Baum%2C+V">V. Baum</a>, <a href="/search/physics?searchtype=author&query=Bay%2C+R">R. Bay</a>, <a href="/search/physics?searchtype=author&query=Beattie%2C+K">K. Beattie</a>, <a href="/search/physics?searchtype=author&query=Beatty%2C+J+J">J. J. Beatty</a>, <a href="/search/physics?searchtype=author&query=Bechet%2C+S">S. Bechet</a>, <a href="/search/physics?searchtype=author&query=Tjus%2C+J+B">J. Becker Tjus</a>, <a href="/search/physics?searchtype=author&query=Becker%2C+K+-">K. -H. Becker</a>, <a href="/search/physics?searchtype=author&query=Bell%2C+M">M. Bell</a> , et al. (253 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="1207.0810v2-abstract-short" style="display: inline;"> We present a fast likelihood method for including event-level neutrino telescope data in parameter explorations of theories for new physics, and announce its public release as part of DarkSUSY 5.0.6. Our construction includes both angular and spectral information about neutrino events, as well as their total number. We also present a corresponding measure for simple model exclusion, which can be u… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1207.0810v2-abstract-full').style.display = 'inline'; document.getElementById('1207.0810v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1207.0810v2-abstract-full" style="display: none;"> We present a fast likelihood method for including event-level neutrino telescope data in parameter explorations of theories for new physics, and announce its public release as part of DarkSUSY 5.0.6. Our construction includes both angular and spectral information about neutrino events, as well as their total number. We also present a corresponding measure for simple model exclusion, which can be used for single models without reference to the rest of a parameter space. We perform a number of supersymmetric parameter scans with IceCube data to illustrate the utility of the method: example global fits and a signal recovery in the constrained minimal supersymmetric standard model (CMSSM), and a model exclusion exercise in a 7-parameter phenomenological version of the MSSM. The final IceCube detector configuration will probe almost the entire focus-point region of the CMSSM, as well as a number of MSSM-7 models that will not otherwise be accessible to e.g. direct detection. Our method accurately recovers the mock signal, and provides tight constraints on model parameters and derived quantities. We show that the inclusion of spectral information significantly improves the accuracy of the recovery, providing motivation for its use in future IceCube analyses. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1207.0810v2-abstract-full').style.display = 'none'; document.getElementById('1207.0810v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 October, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 July, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">29 pages, 6 figures. v2 adds additional explanation in p-value derivation, matches version accepted for publication in JCAP</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JCAP 11(2012)057 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1203.0849">arXiv:1203.0849</a> <span> [<a href="https://arxiv.org/pdf/1203.0849">pdf</a>, <a href="https://arxiv.org/ps/1203.0849">ps</a>, <a href="https://arxiv.org/format/1203.0849">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1742-6596/375/1/012019">10.1088/1742-6596/375/1/012019 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of nuclear recoils in liquid argon with monoenergetic neutrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Regenfus%2C+C">C. Regenfus</a>, <a href="/search/physics?searchtype=author&query=Allkofer%2C+Y">Y. Allkofer</a>, <a href="/search/physics?searchtype=author&query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&query=Creus%2C+W">W. Creus</a>, <a href="/search/physics?searchtype=author&query=Ferella%2C+A">A. Ferella</a>, <a href="/search/physics?searchtype=author&query=Rochet%2C+J">J. Rochet</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">M. Walter</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="1203.0849v1-abstract-short" style="display: inline;"> For the development of liquid argon dark matter detectors we assembled a setup in the laboratory to scatter neutrons on a small liquid argon target. The neutrons are produced mono-energetically (E_kin=2.45 MeV) by nuclear fusion in a deuterium plasma and are collimated onto a 3" liquid argon cell operating in single-phase mode (zero electric field). Organic liquid scintillators are used to tag sca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1203.0849v1-abstract-full').style.display = 'inline'; document.getElementById('1203.0849v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1203.0849v1-abstract-full" style="display: none;"> For the development of liquid argon dark matter detectors we assembled a setup in the laboratory to scatter neutrons on a small liquid argon target. The neutrons are produced mono-energetically (E_kin=2.45 MeV) by nuclear fusion in a deuterium plasma and are collimated onto a 3" liquid argon cell operating in single-phase mode (zero electric field). Organic liquid scintillators are used to tag scattered neutrons and to provide a time-of-flight measurement. The setup is designed to study light pulse shapes and scintillation yields from nuclear and electronic recoils as well as from 伪-particles at working points relevant to dark matter searches. Liquid argon offers the possibility to scrutinise scintillation yields in noble liquids with respect to the populations of the two fundamental excimer states. Here we present experimental methods and first results from recent data towards such studies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1203.0849v1-abstract-full').style.display = 'none'; document.getElementById('1203.0849v1-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 March, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">9 pages, 8 figures, proceedings of TAUP 2011, to be published in Journal of Physics: Conference Series (JCPS)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Physics: Conference Series 375 (2012) 012019 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1110.4556">arXiv:1110.4556</a> <span> [<a href="https://arxiv.org/pdf/1110.4556">pdf</a>, <a href="https://arxiv.org/ps/1110.4556">ps</a>, <a href="https://arxiv.org/format/1110.4556">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic and Molecular Clusters">physics.atm-clus</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.84.193402">10.1103/PhysRevB.84.193402 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Au40: A Large Tetrahedral Magic Cluster </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Jiang%2C+D">De-en Jiang</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">Michael Walter</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="1110.4556v1-abstract-short" style="display: inline;"> 40 is a magic number for tetrahedral symmetry predicted in both nuclear physics and the electronic jellium model. We show that Au40 could be such a a magic cluster from density functional theory-based basin hopping for global minimization. The putative global minimum found for Au40 has a twisted pyramid structure, reminiscent of the famous tetrahedral Au20, and a sizable HOMO-LUMO gap of 0.69 eV,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.4556v1-abstract-full').style.display = 'inline'; document.getElementById('1110.4556v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1110.4556v1-abstract-full" style="display: none;"> 40 is a magic number for tetrahedral symmetry predicted in both nuclear physics and the electronic jellium model. We show that Au40 could be such a a magic cluster from density functional theory-based basin hopping for global minimization. The putative global minimum found for Au40 has a twisted pyramid structure, reminiscent of the famous tetrahedral Au20, and a sizable HOMO-LUMO gap of 0.69 eV, indicating its molecular nature. Analysis of the electronic states reveals that the gap is related to shell closings of the metallic electrons in a tetrahedrally distorted effective potential. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.4556v1-abstract-full').style.display = 'none'; document.getElementById('1110.4556v1-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 October, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2011. </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">5 pages, 5 figures, phys. rev. b, in press</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review B 84 (2011) 193402 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/0506121">arXiv:physics/0506121</a> <span> [<a href="https://arxiv.org/pdf/physics/0506121">pdf</a>, <a href="https://arxiv.org/ps/physics/0506121">ps</a>, <a href="https://arxiv.org/format/physics/0506121">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic and Molecular Clusters">physics.atm-clus</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/PhysRevB.72.205440">10.1103/PhysRevB.72.205440 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Optical absorption by magnesia-supported gold clusters and nanocatalysts: effects from the support, cluster and adsorbants </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walter%2C+M">Michael Walter</a>, <a href="/search/physics?searchtype=author&query=H%C3%A4kkinen%2C+H">Hannu H盲kkinen</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="physics/0506121v2-abstract-short" style="display: inline;"> Polarization-resolved optical spectra of magnesia-supported gold clusters Au$_N$/MgO (N=1,2,4,8), bound at a surface color center $F_s$ of the MgO(100) face, are calculated from the time-dependent density functional theory. The optical lines for n=1,2 are dominated by transitions that involve strong hybridization between gold and $F_s$ states whereas for n=4,8 intracluster transitions dominate.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0506121v2-abstract-full').style.display = 'inline'; document.getElementById('physics/0506121v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/0506121v2-abstract-full" style="display: none;"> Polarization-resolved optical spectra of magnesia-supported gold clusters Au$_N$/MgO (N=1,2,4,8), bound at a surface color center $F_s$ of the MgO(100) face, are calculated from the time-dependent density functional theory. The optical lines for n=1,2 are dominated by transitions that involve strong hybridization between gold and $F_s$ states whereas for n=4,8 intracluster transitions dominate. The theoretical optical spectra are sensitive to cluster structure and adsorbants (here CO and O$_2$ molecules on Au$_8$/MgO) which suggests polarization-resolved optical spectroscopy as a powerful tool to investigate structures and functions of chemically active, supported clusters. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0506121v2-abstract-full').style.display = 'none'; document.getElementById('physics/0506121v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 August, 2005; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 June, 2005; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2005. </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">4 pages,4 figures transfered to PRB referee process</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/9912018">arXiv:physics/9912018</a> <span> [<a href="https://arxiv.org/pdf/physics/9912018">pdf</a>, <a href="https://arxiv.org/ps/physics/9912018">ps</a>, <a href="https://arxiv.org/format/physics/9912018">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> </div> </div> <p class="title is-5 mathjax"> Stopping of ion beam in a temperature anisotropic magnetized plasma </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Nersisyan%2C+H+B">H. B. Nersisyan</a>, <a href="/search/physics?searchtype=author&query=Walter%2C+M">M. Walter</a>, <a href="/search/physics?searchtype=author&query=Zwicknagel%2C+G">G. Zwicknagel</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="physics/9912018v2-abstract-short" style="display: inline;"> Using the dielectric theory for a weakly coupled plasma we investigate the stopping power of the ion in a temperature anisotropic magnetized electron plasma. The analysis is based on the assumption that the energy variation of the ion is much less than its kinetic energy. The obtained general expression for stopping power is analyzed for weak and strong magnetic fields (i.e., for the electron cy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/9912018v2-abstract-full').style.display = 'inline'; document.getElementById('physics/9912018v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/9912018v2-abstract-full" style="display: none;"> Using the dielectric theory for a weakly coupled plasma we investigate the stopping power of the ion in a temperature anisotropic magnetized electron plasma. The analysis is based on the assumption that the energy variation of the ion is much less than its kinetic energy. The obtained general expression for stopping power is analyzed for weak and strong magnetic fields (i.e., for the electron cyclotron frequency less than and greater than the plasma frequency), and for low and high ion velocities. It is found that the friction coefficient contains, in addition to the usual velocity independent friction coefficient, an anomulous term which diverges logarithmically as the projectile velocity approaches zero. The physical origin of this anomulous term is the coupling between the cyclotron motion of the electrons and the long-wave length, low-frequency fluctuations produced by the projectile ion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/9912018v2-abstract-full').style.display = 'none'; document.getElementById('physics/9912018v2-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 December, 1999; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 December, 1999; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 1999. </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, 11 figures, REVTEX4</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span 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