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β-decay scheme of Te140 to I140: Suppression of Gamow-Teller transitions between the neutron h9/2 and proton h11/2 partner orbitals

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Physical Review C 2017年第1期96卷 014325-014325页

作者： B. Moon C.-B. Moon A. Odahara R. Lozeva P.-A. Söderström F. Browne C. Yuan A. Yagi B. Hong H. S. Jung P. Lee C. S. Lee S. Nishimura P. Doornenbal G. Lorusso T. Sumikama H. Watanabe I. Kojouharov T. Isobe H. Baba H. Sakurai R. Daido Y. Fang H. Nishibata Z. Patel S. Rice L. Sinclair J. Wu Z. Y. Xu R. Yokoyama T. Kubo N. Inabe H. Suzuki N. Fukuda D. Kameda H. Takeda D. S. Ahn Y. Shimizu D. Murai F. L. Bello Garrote J. M. Daugas F. Didierjean E. Ideguchi T. Ishigaki S. Morimoto M. Niikura I. Nishizuka T. Komatsubara Y. K. Kwon K. Tshoo Department of Physics Korea University Seoul 02841 Republic of Korea Faculty of Science Hoseo University Chung-Nam 31499 Republic of Korea Department of Physics Osaka University Osaka 560-0043 Japan IPHC CNRS IN2P3 and University of Strasbourg F-67037 Strasbourg Cedex 2 France CSNSM CNRS/IN2P3 University Paris-Sud F-91405 Orsay Campus France RIKEN Nishina Center Wako Saitama 351-0198 Japan Technische Universität Darmstadt D-64289 Darmstadt Germany School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen University Zhuhai 519-082 China Department of Physics Chung-Ang University Seoul 06974 Republic of Korea GSI Helmholtzzentrum für Schwerionenforschung GmbH D-64291 Darmstadt Germany Department of Physics University of Surrey Guildford GU2 7XH United Kingdom Department of Physics University of York Heslington York YO10 5DD United Kingdom School of Physics and State key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China Department of Physics University of Tokyo Tokyo 113-0033 Japan Center for Nuclear Study University of Tokyo RIKEN Campus Wako Saitama 351-0198 Japan Department of Physics Rikkyo University Tokyo 172-8501 Japan Department of Physics University of Oslo N-0316 Oslo Norway CEA DAM DIF F-91297 Arpajon Cedex France RCNP Osaka University Osaka 567-0047 Japan Department of Physics Tohoku University Sendai Miyagi 980-8578 Japan Rare Isotope Science Project Institute for Basic Science Daejeon 34047 Republic of Korea

We report for the first time the β-decay scheme of Te140 (Z=52) to I140 (Z=53), with a specific focus on the Gamow-Teller strength along N=87 isotones. These results were obtained in an experiment performed at the Radioactive Ion Beam Factory (RIBF), RIKEN, where the parent nuclide, Te140, was produced through the in-flight fission of a U238 beam at 345 MeV per nucleon impinging on a Be9 target. Based on data from the high-efficiency γ-ray spectrometer, EUROBALL-RIKEN Cluster Array (EURICA), we constructed a decay scheme of I140. The half-life of Te140 has been determined to be 350(5) ms. A level at 926 keV has been assigned as a (1+) state based on the logft value of 4.89(6). This (1+) state, commonly observed in odd-odd nuclei, can be interpreted in terms of the πh11/2νh9/2 configuration formed by the Gamow-Teller transition between a neutron in the h9/2 orbital and a proton in the h11/2 orbital. We observe a sharp contrast to this type of β-decay branching to the lower-lying 1+ states between I140 and I136, where we see a large reduction as the number of neutrons increases. This is in contrast to the prediction by large-scale shell model calculations. To investigate this type of the suppression, results of the Nilsson model calculations will be discussed. Along the isotones with N=87, we discuss a characteristic feature of the Gamow-Teller distributions at 1+ states with respect to the isospin difference.

关键词： Beta decay Energy levels & level densities Nuclear structure & decays r process 90 ≤ A ≤ 149 Radiation detectors Radioactive beams Shell model Spectrometers & spectroscopic techniques

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β decay of Cd129 and excited states in In129

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Physical Review C 2015年第5期91卷 054324-054324页

作者： J. Taprogge A. Jungclaus H. Grawe S. Nishimura P. Doornenbal G. Lorusso G. S. Simpson P.-A. Söderström T. Sumikama Z. Y. Xu H. Baba F. Browne N. Fukuda R. Gernhäuser G. Gey N. Inabe T. Isobe H. S. Jung D. Kameda G. D. Kim Y.-K. Kim I. Kojouharov T. Kubo N. Kurz Y. K. Kwon Z. Li H. Sakurai H. Schaffner K. Steiger H. Suzuki H. Takeda Zs. Vajta H. Watanabe J. Wu A. Yagi K. Yoshinaga G. Benzoni S. Bönig K. Y. Chae L. Coraggio A. Covello J.-M. Daugas F. Drouet A. Gadea A. Gargano S. Ilieva F. G. Kondev T. Kröll G. J. Lane A. Montaner-Pizá K. Moschner D. Mücher F. Naqvi M. Niikura H. Nishibata A. Odahara R. Orlandi Z. Patel Zs. Podolyák A. Wendt Instituto de Estructura de la Materia CSIC E-28006 Madrid Spain Departamento de Física Teórica Universidad Autónoma de Madrid E-28049 Madrid Spain RIKEN Nishina Center RIKEN 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany National Physical Laboratory NPL Teddington Middlesex TW11 0LW United Kingdom Department of Physics University of Surrey Guildford GU2 7XH United Kingdom LPSC Université Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble F-38026 Grenoble Cedex France Department of Physics Tohoku University Aoba Sendai Miyagi 980-8578 Japan Department of Physics University of Tokyo Hongo 7-3-1 Bunkyo-ku 113-0033 Tokyo Japan School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4JG United Kingdom Physik Department E12 Technische Universität München D-85748 Garching Germany Institut Laue-Langevin B.P. 156 F-38042 Grenoble Cedex 9 France Department of Physics Chung-Ang University Seoul 156-756 Republic of Korea Rare Isotope Science Project Institute for Basic Science Daejeon 305-811 Republic of Korea Department of Nuclear Engineering Hanyang University Seoul 133-791 Republic of Korea School of Physics and State key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China MTA Atomki P.O. Box 51 Debrecen H-4001 Hungary Department of Physics Osaka University Machikaneyama-machi 1-1 Osaka 560-0043 Toyonaka Japan Department of Physics Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki Noda Chiba Japan INFN Sezione di Milano via Celoria 16 I-20133 Milano Italy Institut für Kernphysik Technische Universität Darmstadt D-64289 Darmstadt Germany Department of Physics Sungkyunkwan University Suwon 440-746 Republic of Korea Istituto Nazionale di Fisica Nucleare Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy Dipartimento di Fisica Università di Napo

The β decay of Cd129, produced in the relativistic fission of a U238 beam, was experimentally studied at the RIBF facility at the RIKEN Nishina Center. From the γ radiation emitted after the β decays, a level scheme of In129 was established comprising 31 excited states and 69 γ-ray transitions. The experimentally determined level energies are compared to state-of-the-art shell-model calculations. The half-lives of the two β-decaying states in Cd129 were deduced and the β feeding to excited states in In129 were analyzed. It is found that, as in most cases in the Z<50, N≤82 region, both decays are dominated by the ν0g7/2→π0g9/2 Gamow–Teller transition, although the contribution of first-forbidden transitions cannot be neglected.

关键词： CADMIUM isotopes INDIUM isotopes PARTICLE decays EXCITED states NUCLEAR fusion

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β decay of semi-magic Cd130: Revision and extension of the level scheme of In130

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Physical Review C 2016年第2期94卷 024303-024303页

作者： A. Jungclaus H. Grawe S. Nishimura P. Doornenbal G. Lorusso G. S. Simpson P.-A. Söderström T. Sumikama J. Taprogge Z. Y. Xu H. Baba F. Browne N. Fukuda R. Gernhäuser G. Gey N. Inabe T. Isobe H. S. Jung D. Kameda G. D. Kim Y.-K. Kim I. Kojouharov T. Kubo N. Kurz Y. K. Kwon Z. Li H. Sakurai H. Schaffner Y. Shimizu K. Steiger H. Suzuki H. Takeda Zs. Vajta H. Watanabe J. Wu A. Yagi K. Yoshinaga G. Benzoni S. Bönig K. Y. Chae L. Coraggio J.-M. Daugas F. Drouet A. Gadea A. Gargano S. Ilieva N. Itaco F. G. Kondev T. Kröll G. J. Lane A. Montaner-Pizá K. Moschner D. Mücher F. Naqvi M. Niikura H. Nishibata A. Odahara R. Orlandi Z. Patel Zs. Podolyák A. Wendt Instituto de Estructura de la Materia CSIC E-28006 Madrid Spain GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany RIKEN Nishina Center RIKEN 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan National Physical Laboratory NPL Teddington Middlesex TW11 0LW United Kingdom Department of Physics University of Surrey Guildford GU2 7XH United Kingdom LPSC Université Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble F-38026 Grenoble Cedex France Department of Physics Tohoku University Aoba Sendai Miyagi 980-8578 Japan Departamento de Física Teórica Universidad Autónoma de Madrid E-28049 Madrid Spain Department of Physics University of Tokyo Hongo 7-3-1 Bunkyo-ku 113-0033 Tokyo Japan School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Physik Department E12 Technische Universität München D-85748 Garching Germany Institut Laue-Langevin B.P. 156 F-38042 Grenoble Cedex 9 France Department of Physics Chung-Ang University Seoul 156-756 Republic of Korea Rare Isotope Science Project Institute for Basic Science Daejeon 305-811 Republic of Korea Department of Nuclear Engineering Hanyang University Seoul 133-791 Republic of Korea School of Physics and State key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China MTA Atomki P.O. Box 51 Debrecen H-4001 Hungary Department of Physics Osaka University Machikaneyama-machi 1-1 Osaka 560-0043 Toyonaka Japan Department of Physics Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki Noda Chiba Japan INFN Sezione di Milano via Celoria 16 I-20133 Milano Italy Institut für Kernphysik Technische Universität Darmstadt D-64289 Darmstadt Germany Department of Physics Sungkyunkwan University Suwon 440-746 Republic of Korea Istituto Nazionale di Fisica Nucleare Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy CEA DAM DIF 91297 Arpajon cedex France

The β decay of the semi-magic nucleus Cd130 has been studied at the RIBF facility at the RIKEN Nishina Center. The high statistics of the present experiment allowed for a revision of the established level scheme of In130 and the observation of additional β feeding to high-lying core-excited states in In130. The experimental results are compared to shell-model calculations employing a model space consisting of the full major N=50–82 neutron and Z=28–50 proton shells and the NA-14 interaction, and good agreement is found.

关键词： Beta decay Electromagnetic transitions Energy levels & level densities Nuclear structure & decays Shell model 90 ≤ A ≤ 149

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β-decay spectroscopy at RIBF: The EURICA project

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AIP Conference Proceedings 2014年第1期1594卷 370-379页

作者： G. Lorusso S. Nishimura H. Baba F. Browne R. Daido P. Doornenbal F. Yifan G. Gey T. Isobe H.-S. Jung Z. Li D. Lubos K. Moschner H. Nishibata Z. Patel S. Rice L. Sinclair P.-A. Söderström T. Sumikama J. Taprogge Zs. Vajta Z. Y. Xu H. Watanabe J. Wu A. Yagi K. Yoshinaga EURICA Collaboration RIKEN Nishina Center 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4JG United Kingdom Department of Physics Osaka University Machikaneyama-machi 1-1 Osaka 560-0043 Toyonaka Japan LPSC Université Joseph Fourier Grenoble 1 Institut Polytechnique de Grenoble CNRS/IN2P3 38026 Grenoble Cedex LPSC France Department of Physics University of Notre Dame Notre Dame IN 46556 USA School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China Physik Department E12 Technische Universität München D-85748 Garching Germany Institut für Kernphysik Universität zu Köln Zülpicher Strasse 77 D-50937 Köln Germany Department of Physics University of Surrey Guildford GU2 7XH United Kingdom Department of Physics University of York York YO10 5DD United Kingdom Department of Physics Tohoku University Aoba Sendai Miyagi 980-8578 Japan Departamento de Física Teórica Universidad Autónoma de Madrid E-28049 Madrid Spain Institute for Nuclear Research Hungarian Academy of Sciences P.O. Box 51 Debrecen H-4001 Hungary Department of Physics University of Tokyo Hongo Bunkyo-ku Tokyo 113-0033 Japan Department of Physics Beihang University Beijing 100191 China Department of Physics Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki Noda Chiba Japan

EURICA is a project at the RIKEN Nishina Center aimed at studying a wide range of exotic nuclei through β-decay measurements and high-resolution γ-ray spectroscopy. During its first two years of operation, about 80 days of beam time have been dedicated to the project allowing the exploration of several very exotic regions of the nuclear chart, which include key nuclei such as 78Ni , 100Sn , 110Zr , 128Pd , and 138Sn . Data analysis of the EURICA experiments is currently ongoing.

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Corrigendum to “Performance test of the electromagnetic particle detectors for the LHAASO experiment” [Nucl. Instrum. Methods Phys. Res. A 1001 (2021) 165193]

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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 2022年 1022卷

作者： F. Aharonian Q. An Axikegu L.X. Bai Y.X. Bai Y.W. Bao D. Bastieri X.J. Bi Y.J. Bi H. Cai J.T. Cai Z. Cao J. Chang J.F. Chang X.C. Chang B.M. Chen J. Chen X. Zuo University of Chinese Academy of Sciences 100049 Beijing China Department of Engineering Physics Tsinghua University 100084 Beijing China Dublin Institute for Advanced Studies 31 Fitzwilliam Place 2 Dublin Ireland National Astronomical Observatories Chinese Academy of Sciences 100101 Beijing China Max–Planck-Institut for Nuclear Physics P.O. Box 103980 69029 Heidelberg Germany State Key Laboratory of Particle Detection and Electronics China University of Science and Technology of China 230026 Hefei Anhui China School of Physical Science and Technology & School of Information Science and Technology Southwest Jiaotong University 610031 Chengdu Sichuan China Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center Institute of High Energy Physics Chinese Academy of Sciences 100049 Beijing China College of Physics Sichuan University 610065 Chengdu Sichuan China TIANFU Cosmic Ray Research Center Chengdu Sichuan China School of Astronomy and Space Science Nanjing University 210023 Nanjing Jiangsu China Center for Astrophysics Guangzhou University 510006 Guangzhou Guangdong China School of Physics and Technology Wuhan University 430072 Wuhan Hubei China Key Laboratory of Dark Matter and Space Astronomy Purple Mountain Observatory Chinese Academy of Sciences 210023 Nanjing Jiangsu China Hebei Normal University 050024 Shijiazhuang Hebei China

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pathfinder: A Semantic Framework for Literature Review and Knowledge Discovery in Astronomy

arXiv

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arXiv 2024年

作者： Iyer, Kartheik G. Yunus, Mikaeel O’Neill, Charles Ye, Christine Hyk, Alina McCormick, Kiera Ciucă, Ioana Wu, John F. Accomazzi, Alberto Astarita, Simone Chakrabarty, Rishabh Cranney, Jesse Field, Anjalie Ghosal, Tirthankar Ginolfi, Michele Huertas-Company, Marc Jablońska, Maja Kruk, Sandor Liu, Huiling Marchidan, Gabriel Mistry, Rohit Naiman, J.P. Peek, J.E.G. Polimera, Mugdha Rodríguez Méndez, Sergio J. Schawinski, Kevin Sharma, Sanjib Smith, Michael J. Ting, Yuan-Sen Walmsley, Mike Columbia Astrophysics Laboratory Columbia University 550 West 120th Street New YorkNY10027 United States Department of Physics and Astronomy Johns Hopkins University 3400 N. Charles Street BaltimoreMD21218 United States School of Computing TheAustralian National University 108 North Rd ActonACT2601 Australia Stanford University 450 Jane Stanford Way StanfordCA94305 United States School of Electrical Engineering and Computer Science Oregon State University 1500 SW Jefferson Way CorvallisOR97331 United States Department of Engineering Loyola University Maryland 4501 North Charles Street BaltimoreMD21210 United States Research School of Astronomy & Astrophysics Australian National University Cotter Rd. WestonACT2611 Australia School of Computing Australian National University ActonACT2601 Australia Kavli Institute for Particle Astrophysics and Cosmology Department of Physics Stanford University StanfordCA94305 United States Space Telescope Science Institute 3700 San Martin Drive BaltimoreMD21218 United States Center for Astrophysics Harvard & Smithsonian CambridgeMA02138 United States Camino Bajo del Castillo s/n Villanueva de la Cañada Madrid28692 Spain Paris France Astralis-AITC - Stromlo RSAA Australian National University Cotter Road WestonACT2600 Australia Department of Computer Science Johns Hopkins University 3400 North Charles Street BaltimoreMD21218 United States National Center for Computational Sciences Oak Ridge National Laboratory Oak RidgeTN37831 United States Dipartimento di Fisica e Astronomia Universita di Firenze Via G. Sansone 1 Sesto Fiorentino Firenze50019 Italy INAF - Osservatorio Astrofisico di Arcetri Largo E. Fermi 5 FirenzeI-50125 Italy Instituto de Astrofisica de Canarias C. Via Lactea 1 Tenerife La LagunaE-38205 Spain Universidad de la Laguna dept. Astrofisica Tenerife La LagunaE-38206 Spain Universite Paris-Cite LERMA - Observatoire de Paris PSL Paris France SCIPP University of

The exponential growth of astronomical literature poses significant challenges for researchers navigating and synthesizing general insights or even domain-specific knowledge. We present pathfinder, a machine learning framework designed to enable literature review and knowledge discovery in astronomy, focusing on semantic searching with natural language instead of syntactic searches with key-words. Utilizing state-of-the-art large language models (LLMs) and a corpus of 350,000 peer-reviewed papers from the Astrophysics Data System (ADS), pathfinder offers an innovative approach to scientific inquiry and literature exploration. Our framework couples advanced retrieval techniques with LLM-based synthesis to search astronomical literature by semantic context as a complement to currently existing methods that use key-words or citation graphs. It addresses complexities of jargon, named entities, and temporal aspects through time-based and citation-based weighting schemes. We demonstrate the tool’s versatility through case studies, showcasing its application in various research scenarios. The system’s performance is evaluated using custom benchmarks, including single-paper and multi-paper tasks. Beyond literature review, pathfinder offers unique capabilities for reformatting answers in ways that are accessible to various audiences (e.g. in a different language or as simplified text), visualizing research landscapes, and tracking the impact of observatories and methodologies. This tool represents a significant advancement in applying AI to astronomical research, aiding researchers at all career stages in navigating modern astronomy literature. © 2024, CC BY.

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Various nuclear structures in Xe140 studied by β decay of ground and isomeric states in I140

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Physical Review C 2022年第4期105卷 044325-044325页

作者： A. Yagi A. Odahara H. Nishibata R. Lozeva C.-B. Moon S. Nishimura K. Yoshida N. Yoshinaga C. Watanabe K. Higashiyama T. Shimoda R. Daido Y. Fang P. S. Lee B. Moon P. Doornenbal G. Lorusso P.-A. Söderström T. Sumikama H. Watanabe T. Isobe H. Baba H. Sakurai F. Browne Z. Patel S. Rice L. Sinclair J. Wu Z. Y. Xu R. Yokoyama T. Kubo N. Inabe H. Suzuki N. Fukuda D. Kameda H. Takeda D. S. Ahn Y. Shimizu D. Murai F. L. Bello Garrote J.-M. Daugas F. Didierjean E. Ideguchi S. Iimura T. Ishigaki H. S. Jung T. Komatsubara Y. K. Kwon C. S. Lee S. Morimoto M. Niikura I. Nishizuka K. Tshoo Department of Physics Osaka University Osaka 560-0043 Japan RIKEN Wako Saitama 351-0198 Japan Department of Physics Kyushu University Fukuoka 819-0395 Japan IPHC CNRS IN2P3 and University of Strasbourg F-67037 Strasbourg Cedex 2 France Université Paris-Saclay IJCLab CNRS/IN2P3 F-91405 Orsay France Department of Display Engineering Hoseo University Chung-Nam 336-795 Republic of Korea Center for Exotic Nuclear Studies Institute for Basic Science Daejeon 34126 Republic of Korea Department of Physics Kyoto University Kyoto 606-8502 Japan Department of Physics Saitama University Saitama City 338-8570 Japan Department of Physics Chiba Institute of Technology Chiba 275-0023 Japan Department of Physics Chung-Ang University Seoul 156-756 Republic of Korea Korea Multi-purpose Accelerator Complex Korea Atomic Energy Research Institute Mirae-ro 181 Gyeongju-si 38180 Republic of Korea Department of Physics Korea University Seoul 02841 Republic of Korea Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH) Str. Reactorului 30 Bucharest-Măgurele 077125 Romania School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191 China Department of Physics University of Tokyo Hongo Tokyo 113-0033 Japan School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4JG United Kingdom Department of Physics University of Surrey Guildford GU2 7XH United Kingdom Department of Physics University of York Heslington York YO10 5DD United Kingdom School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China CNS University of Tokyo 2-1 Hirosawa Wako Saitama 351-0198 Japan Department of Physics Rikkyo University Toshima Tokyo 171-8501 Japan Department of Physics University of Oslo N-0316 Oslo Norway CEA DAM DIF F-91297 Arpajon Cedex France RCNP Osaka University Ibaraki Osaka 567-0047 Japan

Structure of the neutron-rich N=86 isotope 140Xe, located northeast of a doubly-magic nucleus 132Sn, is investigated by β−γ spectroscopy. Two β-decay isomers in I140 are newly found in the study of two different β decays of I140 which were produced by two reactions (i) direct in-flight fission at a primary target and (ii) β decay of Te140 at an active stopper. Half-lives of the β decays of the ground state, the low-spin isomer, and the high-spin isomer are determined to be 0.38(2), 0.91(5), and 0.47(4) s, respectively. Decay schemes of the β decay of the high-spin isomer and of the mixed β decays of the ground state and the low-spin isomer in I140 to Xe140 are constructed using the information on γ-ray coincidence relation and γ-ray intensity. Nuclear structures of the low-lying states in Xe140 and I140 are discussed by comparing the experimental results to two theoretical calculations based on a large-scale shell model and the deformed Skyrme Hartree-Fock-Bogoliubov plus deformed quasiparticle-random-phase approximation. Possible candidates for (quasi-)γ-band members of 2+ and 4+ states and the octupole collective 1− state are proposed in Xe140. Increase of quadrupole, triaxial, and octupole collectivities is discussed with the increase of neutron and proton numbers.

关键词： Beta decay Collective models Electromagnetic transitions Isomer decays Nuclear spin & parity Nuclear structure & decays Shell model

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Triaxiality of neutron-rich Ge84,86,88 from low-energy nuclear spectra

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Physical Review C 2017年第1期96卷 011301(R)-011301(R)页

作者： M. Lettmann V. Werner N. Pietralla P. Doornenbal A. Obertelli T. R. Rodríguez K. Sieja G. Authelet H. Baba D. Calvet F. Château S. Chen A. Corsi A. Delbart J.-M. Gheller A. Giganon A. Gillibert V. Lapoux T. Motobayashi M. Niikura N. Paul J.-Y. Roussé H. Sakurai C. Santamaria D. Steppenbeck R. Taniuchi T. Uesaka T. Ando T. Arici A. Blazhev F. Browne A. Bruce R. J. Caroll L. X. Chung M. L. Cortés M. Dewald B. Ding F. Flavigny S. Franchoo M. Górska A. Gottardo A. Jungclaus J. Lee B. D. Linh J. Liu Z. Liu C. Lizarazo S. Momiyama K. Moschner S. Nagamine N. Nakatsuka C. Nita C. R. Nobs L. Olivier Z. Patel Zs. Podolyák M. Rudigier T. Saito C. Shand P.-A. Söderström I. Stefan V. Vaquero K. Wimmer Z. Xu Institut für Kernphysik Technische Universität Darmstadt 64289 Darmstadt Germany RIKEN Nishina Center 2-1 Hirosawa Wako Saitama 351-0198 Japan CEA Centre de Saclay IRFU/Service de Physique Nucléaire 91191 Gif-sur-Yvette France Departamento de Física Teórica Universidad Autónoma de Madrid 28049 Madrid Spain IPHC CNRS/IN2P3 et Université de Strasbourg 67037 Strasbourg France State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 People's Republic of China Department of Physics University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany Institut für Kernphysik Universität zu Köln 50937 Köln Germany School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Department of Physics University of Surrey Guildford GU2 7XH United Kingdom Institute for Nuclear Science and Technology VINATOM P.O. Box 5T-160 Nghia Do Hanoi Vietnam Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 People's Republic of China Institut de Physique Nucléaire Orsay IN2P3-CNRS 91406 Orsay Cedex France Instituto de Estructura de la Materia CSIC 28006 Madrid Spain Department of Physics University of Hong Kong Pokfulam Hong Kong Department of Physics Faculty of Science Kyoto University Kyoto 606-8502 Japan Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH) 077125 Bucharest Romania KU Leuven Instituut voor Kern- en Stralingsfysica 3001 Leuven Belgium

γ-ray transitions between low-spin states of the neutron-rich Ge84,86,88 were measured by means of in-flight γ-ray spectroscopy at 270 MeV/u. Excited 61+,41,2+, and 21,2+ states of Ge84,86 and 41+ and 21,2+ states of Ge88 were observed. Furthermore, a candidate for a 31+ state of Ge86 was identified. This state plays a key role in the discussion of ground-state triaxiality of Ge86, along with other features of its low-energy level scheme. A new region of triaxially deformed nuclei is proposed in the Ge isotopic chain.

关键词： Collective levels H & He induced nuclear reactions Nuclear density functional theory Nuclear many-body theory Nuclear structure & decays Nucleon induced nuclear reactions Rare & new isotopes 59 ≤ A ≤ 89 Radioactive beams Shell model

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Corrigendum to “Investigation of structural and physical properties of Eu 3+ ions substituted Ni 0.4 Cu 0.2 Zn 0.4 Fe 2 O 4 spinel ferrite nanoparticles prepared via sonochemical approach” [Res. Phys. 17 (2020) 103061]

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Results in Physics 2024年 65卷

作者： Y. Slimani B. Unal M.A. Almessiere A. Demir Korkmaz Sagar E. Shirsath Ghulam Yasin A.V. Trukhanov A. Baykal Department of Biophysics Institute for Research and Medical Consultations (IRMC) Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia Institute of Forensic Sciences & Legal Medicine and Institute of Nanotechnology & Biotechnology Istanbul University–Cerrahpaşa Buyukcekmece Campus Alkent 2000 Mah. Buyukcekmece Istanbul 34500 Turkey Department of Chemistry Istanbul Medeniyet University 34700 Istanbul Uskudar Turkey School of Materials Science and Engineering University of New South Wales Kensington Sydney NSW 2052 Australia State Key Laboratory of Chemical Resource Engineering College of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China National University of Science and Technology MISiS Moscow Russia South Ural State University 76 Lenin Ave. Chelyabinsk 454080 Russia SSPA “Scientific and Practical Materials Research Centre of the NAS of Belarus” 19 P. Brovki str. Minsk 220072 Belarus Department of Nanomedicine Institute for Research and Medical Consultations (IRMC) Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia

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Excited-state Half-Lives in Cd130 and the Isospin Dependence of Effective Charges

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Physical Review Letters 2024年第22期132卷 222501-222501页

作者： A. Jungclaus M. Górska M. Mikołajczuk J. Acosta J. Taprogge S. Nishimura P. Doornenbal G. Lorusso G. S. Simpson P.-A. Söderström T. Sumikama Z. Xu P. Kumar G. Martínez-Pinedo F. Nowacki P. Van Isacker H. Baba F. Browne N. Fukuda R. Gernhäuser G. Gey N. Inabe T. Isobe H. S. Jung D. Kameda G. D. Kim Y.-K. Kim I. Kojouharov T. Kubo N. Kurz Y. K. Kwon Z. Li H. Sakurai H. Schaffner Y. Shimizu K. Steiger H. Suzuki H. Takeda Zs. Vajta H. Watanabe J. Wu A. Yagi K. Yoshinaga G. Benzoni S. Bönig K. Y. Chae J.-M. Daugas F. Drouet A. Gadea S. Ilieva F. G. Kondev T. Kröll G. J. Lane A. Montaner-Pizá K. Moschner F. Naqvi M. Niikura H. Nishibata A. Odahara R. Orlandi Z. Patel Zs. Podolyák A. Wendt Instituto de Estructura de la Materia CSIC E-28006 Madrid Spain GSI Helmholtzzentrum für Schwerionenforschung D-64291 Darmstadt Germany Faculty of Physics University of Warsaw Warsaw PL-02093 Poland Departamento de Física Teórica Universidad Autónoma de Madrid E-28049 Madrid Spain RIKEN Nishina Center RIKEN 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan LPSC Université Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble F-38026 Grenoble Cedex France Department of Physics Tohoku University Aoba Sendai Miyagi 980-8578 Japan Department of Physics University of Tokyo Hongo 7-3-1 Bunkyo-ku 113-0033 Tokyo Japan Institut für Kernphysik (Theoriezentrum) Fachbereich Physik Technische Universität Darmstadt D-64289 Darmstadt Germany Université de Strasbourg CNRS IPHC UMR Strasbourg 7178 F-67000 France Grand Accélérateur National d’Ions Lourds CEA/DRF–CNRS/IN2P3 F-14076 Caen France School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Physik Department E12 Technische Universität München D-85748 Garching Germany Institut Laue-Langevin B.P. 156 F-38042 Grenoble Cedex 9 France Department of Physics Chung-Ang University Seoul 156-756 Republic of Korea Rare Isotope Science Project Institute for Basic Science Daejeon 305-811 Republic of Korea Department of Nuclear Engineering Hanyang University Seoul 133-791 Republic of Korea School of Physics and State key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China MTA Atomki P.O. Box 51 Debrecen H-4001 Hungary Department of Physics Osaka University Machikaneyama-machi 1-1 Osaka 560-0043 Toyonaka Japan Department of Physics Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki Noda Chiba Japan INFN Sezione di Milano via Celoria 16 I-20133 Milano Italy Institut für Kernphysik Technische Universität Darmstadt D-64289 Darmstadt Germany Department of Physics Sungkyunkwan Univer

The known Iπ=81+, Ex=2129−keV isomer in the semimagic nucleus Cd13082 was populated in the projectile fission of a U238 beam at the Radioactive Isotope Beam Factory at RIKEN. The high counting statistics of the accumulated data allowed us to determine the excitation energy, Ex=2001.2(7) keV, and half-life, T1/2=57(3) ns, of the Iπ=61+ state based on γγ coincidence information. Furthermore, the half-life of the 81+ state, T1/2=224(4) ns, was remeasured with high precision. The new experimental information, combined with available data for Sn134 and large-scale shell model calculations, allowed us to extract proton and neutron effective charges for Sn132, a doubly magic nucleus far-off stability. A comparison to analogous information for Sn100 provides first reliable information regarding the isospin dependence of the isoscalar and isovector effective charges in heavy nuclei.

关键词： Electromagnetic transitions Nuclear structure & decays Shell model

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