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arXiv 2024年

作者： Rose, Jonah C. Torrey, Paul Villaescusa-Navarro, Francisco Lisanti, Mariangela Nguyen, Tri Roy, Sandip Kollmann, Kassidy E. Vogelsberger, Mark Cyr-Racine, Francis-Yan Medvedev, Mikhail V. Genel, Shy Anglés-Alcázar, Daniel Kallivayalil, Nitya Wang, Bonny Y. Costanza, Belén O'Neil, Stephanie Roche, Cian Karmakar, Soumyodipta Garcia, Alex M. Low, Ryan Lin, Shurui Mostow, Olivia Cruz, Akaxia Caputo, Andrea Farahi, Arya Muñoz, Julian B. Necib, Lina Teyssier, Romain Dalcanton, Julianne J. Spergel, David Department of Astronomy University of Florida GainesvilleFL32611 United States Center for Computational Astrophysics Flatiron Institute 162 5th Avenue New YorkNY10010 United States Department of Astronomy University of Virginia CharlottesvilleVA22904 United States Department of Astrophysical Sciences Princeton University Peyton Hall PrincetonNJ08544 United States Department of Physics Princeton University PrincetonNJ08544 United States Department of Physics Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology CambridgeMA02139 United States The NSF AI Institute for Artificial Intelligence and Fundamental Interactions CambridgeMA02139 United States Department of Physics and Astronomy University of New Mexico 210 Yale Blvd NE AlbuquerqueNM87106 United States Institute for Advanced Study School for Natural Sciences PrincetonNJ08540 United States Institute for Theory and Computation Harvard University CambridgeMA02138 United States Department of Physics and Astronomy University of Kansas LawrenceKS66045 United States Laboratory for Nuclear Science Massachusetts Institute of Technology CambridgeMA02139 United States Columbia Astrophysics Laboratory Columbia University 550 West 120th Street New YorkNY10027 United States Department of Physics University of Connecticut 196 Auditorium Road U-3046 StorrsCT06269-3046 United States McWilliams Center for Cosmology and Astrophysics Carnegie Mellon University PittsburghPA15213 United States Facultad de Ciencias Astronómicas y Geofísicas Universidad Nacional de La Plata Observatorio Astronómico Paseo del Bosque La PlataB1900FWA Argentina Department of Astronomy School of Physical Sciences University of Science and Technology of China Anhui Hefei230026 China CAS Key Laboratory for Researches in Galaxies and Cosmology School of Astronomy and Space Science University of Science and Technology of China Anhui Hefei230026 China Theoretical Physics Depa

We introduce the DREAMS project, an innovative approach to understanding the astrophysical implications of alternative dark matter models and their effects on galaxy formation and evolution. The DREAMS project will ultimately comprise thousands of cosmological hydrodynamic simulations that simultaneously vary over dark matter physics, astrophysics, and cosmology in modeling a range of systems-from galaxy clusters to ultra-faint satellites. Such extensive simulation suites can provide adequate training sets for machine-learning-based analyses. This paper introduces two new cosmological hydrodynamical suites of Warm Dark Matter, each comprised of 1024 simulations generated using the arepo code. One suite consists of uniform-box simulations covering a (25 ℎ−1 M☉)3 volume, while the other consists of Milky Way zoom-ins with sufficient resolution to capture the properties of classical satellites. For each simulation, the Warm Dark Matter particle mass is varied along with the initial density field and several parameters controlling the strength of baryonic feedback within the IllustrisTNG model. We provide two examples, separately utilizing emulators and Convolutional Neural Networks, to demonstrate how such simulation suites can be used to disentangle the effects of dark matter and baryonic physics on galactic properties. The DREAMS project can be extended further to include different dark matter models, galaxy formation physics, and astrophysical targets. In this way, it will provide an unparalleled opportunity to characterize uncertainties on predictions for small-scale observables, leading to robust predictions for testing the particle physics nature of dark matter on these scales. © 2024, CC BY.

关键词： Galaxies

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Measurement of the 2νββ Decay Rate and Spectral Shape of Mo100 from the CUPID-Mo Experiment

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Physical Review Letters 2023年第16期131卷 162501-162501页

作者： C. Augier A. S. Barabash F. Bellini G. Benato M. Beretta L. Bergé J. Billard Yu. A. Borovlev L. Cardani N. Casali A. Cazes E. Celi M. Chapellier D. Chiesa I. Dafinei F. A. Danevich M. De Jesus T. Dixon L. Dumoulin K. Eitel F. Ferri B. K. Fujikawa J. Gascon L. Gironi A. Giuliani V. D. Grigorieva M. Gros D. L. Helis H. Z. Huang R. Huang L. Imbert J. Johnston A. Juillard H. Khalife M. Kleifges V. V. Kobychev Yu. G. Kolomensky S. I. Konovalov J. Kotila P. Loaiza L. Ma E. P. Makarov P. de Marcillac R. Mariam L. Marini S. Marnieros X.-F. Navick C. Nones E. B. Norman E. Olivieri J. L. Ouellet L. Pagnanini L. Pattavina B. Paul M. Pavan H. Peng G. Pessina S. Pirro D. V. Poda O. G. Polischuk S. Pozzi E. Previtali Th. Redon A. Rojas S. Rozov V. Sanglard J. A. Scarpaci B. Schmidt Y. Shen V. N. Shlegel F. Šimkovic V. Singh C. Tomei V. I. Tretyak V. I. Umatov L. Vagneron M. Velázquez B. Ware B. Welliver L. Winslow M. Xue E. Yakushev M. Zarytskyy A. S. Zolotarova Univ Lyon Université Lyon 1 CNRS/IN2P3 IP2I-Lyon F-69622 Villeurbanne France National Research Centre “Kurchatov Institute ” Kurchatov Complex of Theoretical and Experimental Physics 117218 Moscow Russia Dipartimento di Fisica Sapienza Università di Roma Piazzale Aldo Moro 2 I-00185 Rome Italy INFN Sezione di Roma P.le Aldo Moro 2 I-00185 Rome Italy INFN Laboratori Nazionali del Gran Sasso I-67100 Assergi (AQ) Italy INFN Gran Sasso Science Institute I-67100 L’Aquila Italy University of California Berkeley California 94720 USA Université Paris-Saclay CNRS/IN2P3 IJCLab 91405 Orsay France Nikolaev Institute of Inorganic Chemistry 630090 Novosibirsk Russia Dipartimento di Fisica Università di Milano-Bicocca I-20126 Milano Italy INFN Sezione di Milano-Bicocca I-20126 Milano Italy Institute for Nuclear Research of NASU 03028 Kyiv Ukraine INFN Sezione di Roma Tor Vergata Via della Ricerca Scientifica 1 I-00133 Rome Italy IRFU CEA Université Paris-Saclay F-91191 Gif-sur-Yvette France Karlsruhe Institute of Technology Institute for Astroparticle Physics 76021 Karlsruhe Germany Lawrence Berkeley National Laboratory Berkeley California 94720 USA Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) Fudan University Shanghai 200433 People’s Republic of China Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Karlsruhe Institute of Technology Institute for Data Processing and Electronics 76021 Karlsruhe Germany National Research Centre Kurchatov Institute Institute of Theoretical and Experimental Physics 117218 Moscow Russia Department of Physics University of Jyväskylä P.O. Box 35 FI-40014 Jyväskylä Finland Finnish Institute for Educational Research University of Jyväskylä P.O. Box 35 FI-40014 Jyvaäskylä Finland Center for Theoretical Physics Sloane Physics Laboratory Yale University New Haven Connecticut 06520-8120 USA Physik Department Technische Universität München Garching D-85748 Germany Department of Modern P

Neutrinoless double beta decay (0νββ) is a yet unobserved nuclear process that would demonstrate Lepton number violation, a clear evidence of beyond standard model physics. The process two neutrino double beta decay (2νββ) is allowed by the standard model and has been measured in numerous experiments. In this Letter, we report a measurement of 2νββ decay half-life of Mo100 to the ground state of Ru100 of [7.07±0.02(stat)±0.11(syst)]×1018 yr by the CUPID-Mo experiment. With a relative precision of ±1.6% this is the most precise measurement to date of a 2νββ decay rate in Mo100. In addition, we constrain higher-order corrections to the spectral shape, which provides complementary nuclear structure information. We report a novel measurement of the shape factor ξ3,1=0.45±0.03(stat)±0.05(syst) based on a constraint on the ratio of higher-order terms from theory, which can be reliably calculated. This is compared to theoretical predictions for different nuclear models. We also extract the first value for the effective axial vector coupling constant obtained from a spectral shape study of 2νββ decay.

关键词： Double beta decay Neutrinoless double beta decay nuclear structure & decays

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Evaluation of CdZnTe spectrometer performance in measuring energy spectra during interventional radiology procedure

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nuclear science and Techniques 2019年第9期30卷 55-60页

作者： Lin Chai Lian Chen Cui-Ping Yang Dong-Dong Zhou Meng-Meng Yang Wei-Wei Qu Gao-Long Zhang Da-Qian Hei Shou-Ping Xu Xin-Jian Chen State Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and Protection Soochow University Suzhou 215123 China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei 230026 China Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions Suzhou 215123 China School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191 China Beijing Advanced Innovation Center for Big Data-Based Precision Medicine Beihang University Beijing 100083 China College of Materials Science and Engineering Nanjing University of Aeronautics and Astronautics Nanjing 211106 China Department of Radiation Oncology PLA General Hospital Beijing 100853 China

Interventional radiology has been beneficial for patients for over 30 years of age with the combination of diagnostic and therapeutic methods. The radiation affecting occupationally exposed workers should be evaluated by means of the energy spectra and flux of X-rays in the treatment room. The present study aims to obtain the energy spectra of interventional procedures and study the capability of some detectors to evaluate the dose in interventional procedures. These measurements were taken by silicon-drift, CdTe, and CdZnTe detectors. The energy spectra were corrected by the energy-response curve of each detector. The energy-response curves of silicon-drift and CdTe detectors provided by the manufacturers specification were used. The energy response of the CdZnTe detector was measured by 133Ba and 152Eu γ sources. The experimental data were compared with the simulation results, and their perfect agreement provides a way to correct the energy or dose response, which can be used for the personal dosimeter developed by our group. Moreover, the measured energy spectra can be used in individual radiation protection. The present study shows that the CdZnTe detector is a good candidate detector in interventional procedures.

关键词： Interventional radiology procedures Energyresponse curve Energy spectrum Radiation protection

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Tests and characterisation of the KI trigger for fast events on the EUSO-SPB2 Fluorescence Telescope 38

Tests and characterisation of the KI trigger for fast events...

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38th International Cosmic Ray Conference, ICRC 2023

作者： Miyamoto, Hiroko Battisti, Matteo Belov, Alexander Bertaina, Mario Blin, Sylvie Creusot, Alxandre Eser, Johannes Filippatos, George Klimov, Pavel Manfrin, Massimiliano Mignone, Marco Parizot, Etienne Piotrowski, Lech Wiktor Prévôt, Guillaume Trofimov, Daniil Abe, S. Adams, J.H. Allard, D. Alldredge, P. Aloisio, R. Anchordoqui, L. Anzalone, A. Arnone, E. Bagheri, M. Baret, B. Barghini, D. Battisti, M. Bellotti, R. Belov, A.A. Bertaina, M. Bertone, P.F. Bianciotto, M. Bisconti, F. Blaksley, C. Blin-Bondil, S. Bolmgren, K. Briz, S. Burton, J. Cafagna, F. Cambié, G. Campana, D. Capel, F. Caruso, R. Casolino, M. Cassardo, C. Castellina, A. Černý, K. Christl, M.J. Colalillo, R. Conti, L. Cotto, G. Crawford, H.J. Cremonini, R. Creusot, A. Cummings, A. de Castro Gónzalez, A. de la Taille, C. Diesing, R. Dinaucourt, P. Di Nola, A. Ebisuzaki, T. Eser, J. Fenu, F. Ferrarese, S. Filippatos, G. Finch, W.W. Flaminio, F. Fornaro, C. Fuehne, D. Fuglesang, C. Fukushima, M. Gadamsetty, S. Gardiol, D. Garipov, G.K. Gazda, E. Golzio, A. Guarino, F. Guépin, C. Haungs, A. Heibges, T. Isgrò, F. Judd, E.G. Kajino, F. Kaneko, I. Kim, S.-W. Klimov, P.A. Krizmanic, J.F. Kungel, V. Kuznetsov, E. López Martínez, F. Mandát, D. Manfrin, M. Marcelli, A. Marcelli, L. Marszal, W. Matthews, J.N. Mese, M. Meyer, S.S. Mimouni, J. Miyamoto, H. Mizumoto, Y. Monaco, A. Nagataki, S. Nachtman, J.M. Naumov, D. Neronov, A. Nonaka, T. Ogawa, T. Ogio, S. Ohmori, H. Olinto, A.V. Onel, Y. Osteria, G. Otte, A.N. Pagliaro, A. Panico, B. Parizot, E. Park, I.H. Paul, T. Pech, M. Perfetto, F. Picozza, P. Piotrowski, L.W. Plebaniak, Z. Posligua, J. Potts, M. Prevete, R. Prévôt, G. Przybylak, M. Reali, E. Reardon, P. Reno, M.H. Ricci, M. Romero Matamala, O.F. Romoli, G. Sagawa, H. Sakaki, N. Saprykin, O.A. Sarazin, F. Sato, M. Schovánek, P. Scotti, V. Selmane, S. Sharakin, S.A. Shinozaki, K. Stepanoff, S. Soriano, J.F. Szabelski, J. Tajima, N. Gran Sasso Science Institute Viale Francesco Crispi 7 l’Aquila67100 Italy INFN Section of Turin Via P. Giuria 1 Turin10125 Italy Moscow119234 Russia Moscow119234 Russia Univ. of Turin Dept. of Physics Via P. Giuria 1 Turin10125 Italy Univ. Paris Cité CNRS Astroparticule et Cosmologie 10 Rue Alice Domon et èonie Duquet Paris75013 France The Univ. of Chicago Dept. of Astronomy and Astrophysics 5640 S. Ellis Avenue ChicagoIL60637 United States Colorado School of Mines Dept of Physics 1523 Illinois St. GoldenCO80401 United States Univ. of Warsaw Faculty of Physics Ludwika Pasteura 5 Warsaw02-093 Poland Algiers Algeria Univ. Constantine I Constantine Algeria Joint Laboratory of Optics Faculty of Science Palacký University Olomouc Czech Republic Institute of Physics The Czech Academy of Sciences Prague Czech Republic Omega Ecole Polytechnique CNRS IN2P3 Palaiseau France Université de Paris CNRS AstroParticule et Cosmologie ParisF-75013 France France Germany Max Planck Institute for Physics Munich Germany Istituto Nazionale di Fisica Nucleare Sezione di Bari Italy Università degli Studi di Bari Aldo Moro Italy Dipartimento di Fisica e Astronomia "Ettore Majorana" Università di Catania Italy Istituto Nazionale di Fisica Nucleare Sezione di Catania Italy Istituto Nazionale di Fisica Nucleare Laboratori Nazionali di Frascati Italy Istituto Nazionale di Fisica Nucleare Sezione di Napoli Italy Università di Napoli Federico II Dipartimento di Fisica "Ettore Pancini" Italy INAF Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo Italy Istituto Nazionale di Fisica Nucleare Sezione di Roma Tor Vergata Italy Università di Roma Tor Vergata Dipartimento di Fisica Roma Italy Istituto Nazionale di Fisica Nucleare Sezione di Torino Italy Dipartimento di Fisica Università di Torino Italy Osservatorio Astrofisico di Torino Istituto Nazionale di Astrofisica Italy Uninettuno University Rome Italy Agenzia Spaziale Italiana Via de

The second generation Extreme Universe Space Observatory on a Super-Pressure Balloon (EUSOSPB2) mission is a stratospheric balloon mission developed within the Joint Exploratory Missions for Extreme Universe Space Observatory (JEM-EUSO) program. The Fluorescence Telescope (FT) is one of the two separate Schmidt telescopes of EUSO-SPB2, which aims at measuring the fluorescence emission of extensive air showers from cosmic rays above the energy of 1 EeV, looking downwards onto the atmosphere from the float altitude of 33 km. The FT measures photons with a time resolution of 1.05 μs in two different modes: single photon counting (PC) and charge integration (KI). In this paper, we describe the latter and report on the measurements of its characteristics. We also present a new trigger based on this channel, the so-called KI trigger, which allows to measure additional types of events, namely very short and intense light pulses. We report on the tests of this trigger mode in the laboratory and at the TurLab facility, and its implementation in the EUSO-SPB2 mission. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Photons

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Efficient MedSAMs: Segment Anything in Medical Images on Laptop

arXiv

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arXiv 2024年

作者： Ma, Jun Li, Feifei Kim, Sumin Asakereh, Reza Le, Bao-Hiep Nguyen-Vu, Dang-Khoa Pfefferle, Alexander Wei, Muxin Gao, Ruochen Lyu, Donghang Yang, Songxiao Purucker, Lennart Marinov, Zdravko Staring, Marius Lu, Haisheng Dao, Thuy Thanh Ye, Xincheng Li, Zhi Brugnara, Gianluca Vollmuth, Philipp Foltyn-Dumitru, Martha Cho, Jaeyoung Mahmutoglu, Mustafa Ahmed Bendszus, Martin Pflüger, Irada Rastogi, Aditya Ni, Dong Yang, Xin Zhou, Guang-Quan Wang, Kaini Heller, Nicholas Papanikolopoulos, Nikolaos Weight, Christopher Tong, Yubing Udupa, Jayaram K. Patrick, Cahill J. Wang, Yaqi Zhang, Yifan Contijoch, Francisco McVeigh, Elliot Ye, Xin He, Shucheng Haase, Robert Pinetz, Thomas Radbruch, Alexander Krause, Inga Kobler, Erich He, Jian Tang, Yucheng Yang, Haichun Huo, Yuankai Luo, Gongning Kushibar, Kaisar Amankulov, Jandos Toleshbayev, Dias Mukhamejan, Amangeldi Egger, Jan Pepe, Antonio Gsaxner, Christina Luijten, Gijs Fujita, Shohei Kikuchi, Tomohiro Wiestler, Benedikt Kirschke, Jan S. de la Rosa, Ezequiel Bolelli, Federico Lumetti, Luca Grana, Costantino Xie, Kunpeng Wu, Guomin Puladi, Behrus Martín-Isla, Carlos Lekadir, Karim Campello, Victor M. Shao, Wei Brisbane, Wayne Jiang, Hongxu Wei, Hao Yuan, Wu Li, Shuangle Zhou, Yuyin Wang, Bo AI Collaborative Centre University Health Network Department of Laboratory Medicine and Pathobiology University of Toronto Vector Institute Toronto Canada Peter Munk Cardiac Centre University Health Network Toronto Canada Toronto General Hospital Research Institute University Health Network Department of Computer Science University of Toronto University Health Network Vector Institute Toronto Canada University of Science Vietnam National University Ho Chi Minh City Viet Nam Institute of Computer Science University of Freiburg Freiburg Germany School of Medicine and Health Harbin Institute of Technology Harbin China Division of Image Processing Department of Radiology Leiden University Medical Center Leiden Netherlands Department of System and Control Engineering School of Engineering Institute of Science Tokyo Formerly Tokyo Institute of Technology Tokyo Japan Institute for Anthropomatics and Robotics Karlsruhe Institute of Technology Karlsruhe Germany School of Information and Communication Engineering University of Electronic Science and Technology of China Chengdu China School of Electrical Engineering and Computer Science University of Queensland Brisbane Australia School of Cyberspace Hangzhou Dianzi University Hangzhou China Division for Computational Radiology and Clinical AI The Department of Neuroradiology University Hospital Bonn Germany Division for Computational Radiology and Clinical AI The Department of Neuroradiology University Hospital Bonn Germany Department of Neuroradiology Heidelberg University Hospital Heidelberg Germany Division for Computational Radiology and Clinical AI Department of Neuroradiology University Hospital Bonn Germany School of Biomedical Engineering Shenzhen University Shenzhen China School of Biological Science and Medical Engineering Southeast University Nanjing China Department of Urology Cleveland Clinic Cleveland United States Department of Computer Science University of Minnesota Minneapolis United St

Promptable segmentation foundation models have emerged as a transformative approach to addressing the diverse needs in medical images, but most existing models require expensive computing, posing a big barrier to their adoption in clinical practice. In this work, we organized the first international competition dedicated to promptable medical image segmentation, featuring a large-scale dataset spanning nine common imaging modalities from over 20 different institutions. The top teams developed lightweight segmentation foundation models and implemented an efficient inference pipeline that substantially reduced computational requirements while maintaining state-of-the-art segmentation accuracy. Moreover, the post-challenge phase advanced the algorithms through the design of performance booster and reproducibility tasks, resulting in improved algorithms and validated reproducibility of the winning solution. Furthermore, the best-performing algorithms have been incorporated into the open-source software with a user-friendly interface to facilitate clinical adoption. The data and code are publicly available to foster the further development of medical image segmentation foundation models and pave the way for impactful real-world applications. © 2024, CC BY-NC-SA.

关键词： Open source software

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Current Status and Development Trend Analysis of Neutron Logging in Uranium Mines in China

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Journal of Physics: Conference Series 2021年第2期1865卷

作者： Zhifeng Liu Chenglong Ding Ruyang Wang Junwu Cao Jiangxi Engineering Technology Research Center of Nuclear Geoscience Data Science and System East China University of Technology Nanchang 330013 Jiangxi China East China University of Technology China Jiangxi Engineering Laboratory on Radioactive Geoscience and Big Data Technology East China University of Technology Nanchang 330013 Jiangxi China The 6th gas production plant of Changqing Oilfield

Neutron logging is a method of measuring uranium fission neutrons by bombarding uranium in ore beds with neutrons emitted by neutron sources or neutron generators. The pulsed neutron logging technology of uranium ore has been popularized and applied in the United States, Russia, Australia and other countries. The key technology is almost monopolized by these countries, but the technology is prohibited in China. In the field of uranium logging, natural gamma logging has always been used in China for uranium quantification, which is characterized by large error, low efficiency, high cost and technical and economic bottlenecks. Due to the fact that the research and application of pulsed neutron log in the field of petroleum exploration and production is relatively mature in China, it is urgent to develop relevant logging instruments and uranium quantitative interpretation methods as independent intellectual property rights. This will lead to a change in the backward appearance of uranium logging. This paper analyzes the research status and development trend of neutron logging in uranium at home and abroad.

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Bound on 3+1 Active-Sterile Neutrino Mixing from the First Four-Week science Run of KATRIN

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Physical Review Letters 2021年第9期126卷 091803-091803页

作者： M. Aker K. Altenmüller A. Beglarian J. Behrens A. Berlev U. Besserer B. Bieringer K. Blaum F. Block B. Bornschein L. Bornschein M. Böttcher T. Brunst T. S. Caldwell L. La Cascio S. Chilingaryan W. Choi D. Díaz Barrero K. Debowski M. Deffert M. Descher P. J. Doe O. Dragoun G. Drexlin S. Dyba F. Edzards K. Eitel E. Ellinger R. Engel S. Enomoto M. Fedkevych A. Felden J. A. Formaggio F. M. Fränkle G. B. Franklin F. Friedel A. Fulst K. Gauda W. Gil F. Glück R. Grössle R. Gumbsheimer T. Höhn V. Hannen N. Haußmann K. Helbing S. Hickford R. Hiller D. Hillesheimer D. Hinz T. Houdy A. Huber A. Jansen L. Köllenberger C. Karl J. Kellerer L. Kippenbrock M. Klein A. Kopmann M. Korzeczek A. Kovalík B. Krasch H. Krause T. Lasserre T. L. Le O. Lebeda N. Le Guennic B. Lehnert A. Lokhov J. M. Lopez Poyato K. Müller M. Machatschek E. Malcherek M. Mark A. Marsteller E. L. Martin C. Melzer S. Mertens S. Niemes P. Oelpmann A. Osipowicz D. S. Parno A. W. P. Poon F. Priester M. Röllig C. Röttele O. Rest R. G. H. Robertson C. Rodenbeck M. Ryšavý R. Sack A. Saenz A. Schaller P. Schäfer L. Schimpf M. Schlösser K. Schlösser L. Schlüter M. Schrank B. Schulz M. Šefčík H. Seitz-Moskaliuk V. Sibille D. Siegmann M. Slezák F. Spanier M. Steidl M. Sturm M. Sun H. H. Telle T. Thümmler L. A. Thorne N. Titov I. Tkachev N. Trost D. Vénos K. Valerius A. P. Vizcaya Hernández S. Wüstling M. Weber C. Weinheimer C. Weiss S. Welte J. Wendel J. F. Wilkerson J. Wolf W. Xu Y.-R. Yen S. Zadoroghny G. Zeller Tritium Laboratory Karlsruhe (TLK) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany Technische Universität München James-Franck-Straße 1 85748 Garching Germany IRFU (DPhP and APC) CEA Université Paris-Saclay 91191 Gif-sur-Yvette France Institute for Data Processing and Electronics (IPE) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany Institute of Experimental Particle Physics (ETP) Karlsruhe Institute of Technology (KIT) Wolfgang-Gaede-Straße 1 76131 Karlsruhe Germany Institute for Astroparticle Physics (IAP) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany Institute for Nuclear Research of Russian Academy of Sciences 60th October Anniversary Prospect 7a 117312 Moscow Russia Institut für Kernphysik Westfälische Wilhelms-Universität Münster Wilhelm-Klemm-Straße 9 48149 Münster Germany Max-Planck-Institut für Kernphysik Saupfercheckweg 1 69117 Heidelberg Germany Max-Planck-Institut für Physik Föhringer Ring 6 80805 München Germany Department of Physics and Astronomy University of North Carolina Chapel Hill North Carolina 27599 USA Triangle Universities Nuclear Laboratory Durham North Carolina 27708 USA Departamento de Química Física Aplicada Universidad Autonoma de Madrid Campus de Cantoblanco 28049 Madrid Spain Department of Physics Faculty of Mathematics and Natural Sciences University of Wuppertal Gaußstraße 20 42119 Wuppertal Germany Center for Experimental Nuclear Physics and Astrophysics and Deptartment of Physics University of Washington Seattle Washington 98195 USA Nuclear Physics Institute of the CAS v. v. i. CZ-250 68 Řež Czech Republic Laboratory for Nuclear Science Massachusetts Institute of Technology 77 Massachusetts Ave Cambridge Massachusetts 02139 USA Department of Physics Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Institute for Nuclea

We report on the light sterile neutrino search from the first four-week science run of the KATRIN experiment in 2019. Beta-decay electrons from a high-purity gaseous molecular tritium source are analyzed by a high-resolution MAC-E filter down to 40 eV below the endpoint at 18.57 keV. We consider the framework with three active neutrinos and one sterile neutrino. The analysis is sensitive to the mass, m4, of the fourth mass state for m42≲1000 eV2 and to active-to-sterile neutrino mixing down to |Ue4|2≳2×10−2. No significant spectral distortion is observed and exclusion bounds on the sterile mass and mixing are reported. These new limits supersede the Mainz results for m42≲1000 eV2 and improve the Troitsk bound for m42<30 eV2. The reactor and gallium anomalies are constrained for 100<Δm412<1000 eV2.

关键词： Sterile neutrinos

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Tunable chiral anomalies and coherent transport on a honeycomb lattice

arXiv

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arXiv 2023年

作者： Saroka, Vasil A. Kong, Fanmiao Downing, Charles A. Payod, Renebeth B. Fischer, Felix R. Sun, Xiankai Bogani, Lapo Center for Quantum Spintronics Department of Physics Norwegian University of Science and Technology TrondheimNO-7491 Norway Institute for Nuclear Problems Belarusian State University Bobruiskaya 11 Minsk220030 Belarus TBpack Ltd. 27 Old Gloucester Street LondonWC1N 3AX United Kingdom Department of Materials University of Oxford 16 Parks Road OxfordOX1 3PH United Kingdom Department of Physics and Astronomy University of Exeter ExeterEX4 4QL United Kingdom Institute of Mathematical Sciences and Physics University of the Philippines Laguna Los Baños4031 Philippines Department of Chemistry University of California BerkeleyCA94720 United States Materials Sciences Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Kavli Energy NanoSciences Institute The University of California Berkeley The Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Bakar Institute of Digital Materials for the Planet Division of Computing Data Science and Society University of California BerkeleyCA94720 United States Department of Electronic Engineering The Chinese University of Hong Kong Shatin New Territories Hong Kong

The search for energy efficient materials is urged not only by the needs of modern electronics but also by emerging applications in neuromorphic computing and artificial intelligence. Currently, there exist two mechanisms for achieving dissipationless transport: superconductivity and the quantum Hall effect. Here we reveal that dissipationless transport is theoretically achievable on a honeycomb lattice by rational design of chiral anomalies tunable without any magnetic fields. Breaking the usual assumption of commensurability and applying an external electric field lead to electronic modes exhibiting chiral anomalies capable of dissipationless transport in the material bulk, rather than on the edge. As the electric field increases, the system reaches a cubic-like dispersion material phase. While providing performance comparable to other known honeycomb lattice-based ballistic conductors such as an armchair nanotube, zigzag nanoribbon and hypothetical cumulenic carbyne, this scheme provides routes to a strongly correlated localization due to flat band dispersion and to exotic cubic dispersion material featuring a pitchfork bifurcation and a critical slowing down phenomena. These results open a new research avenue for the design of energy efficient information processing and higher-order dispersion materials. © 2023, CC BY.

关键词： Honeycomb structures

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Cross-section measurement for the ^(93)Nb(n,2n)^(92g)Nb reaction at the neutron energy of 14.6 MeV by the AMS method

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Chinese Physics C 2018年第7期42卷 37-40页

作者： Guo-Zhu He Bin Shi Ming He Zhen-Yu Li Shi-Long Liu Xiong-Jun Chen Xi-Chao Ruan Qi-Wei Zhang Qi-Wen Fan Heng Li Shao-Yong Wu Shan Jiang Zu-Ying Zhou Key Laboratory of Nuclear Data China Institute of Atomic Energy Beijing 102413 China Department of Nuclear Physics China Institute of Atomic Energy Beijing 102413 China College of Physics Science and Technology Guizhou Normal University Guiyang 530004 China Institute of High Energy Physics Chinese Academy of Science Beijing 100049 China

The cross-section for the 93Nb（n, 2n）92gNb reaction has been measured at the neutron energy of 14.6 MeV using neutron activation and accelerator mass spectrometry （AMS） determination of the long-lived product nuclide 92gNb. The neutron energy was generated from the D＋T neutron source at the China Institute of Atomic Energy （CIAE）. The neutron flux was monitored by measuring the activity of 92mNb produced in the competing reaction channel of 93Nb（n, 2n）92mNb. At the neutron energy of 14.6 MeV, the 93Nb（n, 2n）92gNb reaction cross-section of （736±220） mb was obtained for the first time.

关键词： 93Nb（n,2n）92gNb reaction cross-section D＋T neutron source accelerator mass spectrometry

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Development of a reference database for beta-delayed neutron emission

arXiv

引用

arXiv 2021年

作者： Dimitriou, P. Dillmann, I. Singh, B. Piksaikin, V. Rykaczewski, K.P. Tain, J.L. Algora, A. Banerjee, K. Borzov, I.N. Cano-Ott, D. Chiba, S. Fallot, M. Foligno, D. Grzywacz, R. Huang, X. Marketin, T. Minato, F. Mukherjee, G. Rasco, B.C. Sonzogni, A. Verpelli, M. Egorov, A. Estienne, M. Giot, L. Gremyachkin, D. Madurga, M. McCutchan, E.A. Mendoza, E. Mitrofanov, K.V. Narbonne, M. Romojaro, P. Sanchez-Caballero, A. Scielzo, N.D. NAPC-Nuclear Data Section International Atomic Energy Agency ViennaA-1400 Austria TRIUMF VancouverBCV6T 2A3 Canada Department of Physics and Astronomy University of Victoria VictoriaBCV8P 5C2 Canada Department of Physics and Astronomy McMaster University HamiltonONL8S 4M1 Canada State Scientific Center of Russian Federation Institute of Physics and Power Engineering Obninsk249033 Russia Physics Division Oak Ridge National Laboratory Oak RidgeTN37831 United States IFIC CSIC-Universitat de Valencia Valencia46071 Spain Variable Energy Cyclotron Centre Kolkata700064 India National Research Centre Kurchatov Institute Department of Nuclear Astrophysics 1 Akademika Kurchatova pl. Moscow123182 Russia Joint Institute for Nuclear Research Bogolubov Laboratory of Theoretical Physics 6 Joliot-Curie Dubna Moscow region141980 Russia Avenida Complutense 40 Madrid28040 Spain Tokyo Institute of Technology 2-12-1-N1-9 Ookayama Meguru-ku Japan Subatech CNRS/in2p3 Univ. of Nantes IMTA Nantes44307 France CEA DEN DER/SPRC/LEPh Cadarache Saint Paul-Lez-DuranceF-13108 France Department of Physics and Astronomy University of Tennessee KnoxvilleTN37996 United States China Nuclear Data Center China Institute of Atomic Energy Beijing102413 China Department of Physics Faculty of Science University of Zagreb Zagreb10000 Croatia Nuclear Data Center Nuclear Science and Engineering Center Japan Atomic Energy Agency Tokai-mura Ibaraki-ken Japan JINPA Oak Ridge National Laboratory Oak RidgeTN37831 United States Department of Physics and Astronomy Louisiana State University Baton RougeLA70803 United States National Nuclear Data Center Brookhaven National Laboratory Brookhaven UptonNY United States Physical and Life Sciences Directorate Lawrence Livermore National Laboratory LivermoreCA94550 United States

Beta-delayed neutron emission is important for nuclear structure and astrophysics as well as for reactor applications. Significant advances in nuclear experimental techniques in the past two decades have led to a wealth of new measurements that remain to be incorporated in the databases. We report on a coordinated effort to compile and evaluate all the available β-delayed neutron emission data. The different measurement techniques have been assessed and the data have been compared with semi-microscopic and microscopic-macroscopic models. The new microscopic database has been tested against aggregate total delayed neutron yields, time-dependent group parameters in 6-and 8-group re-presentation, and aggregate delayed neutron spectra. New recommendations of macroscopic delayed-neutron data for fissile materials of interest to applications are also presented. Copyright © 2021, The Authors. All rights reserved.

关键词： Aggregates

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