研究Gamow-Teller跃迁和$N=50$处同位素和基态的确定
摘要：在德国GSI的FRS Ion Catcher (FRS-IC)进行了关于$^{100}$Sn下$N=50$壳层闭合附近缺中子核的直接质量测量。这些核由$^{124}$Xe的束流碎裂产生，在碎片分离器FRS中分离并输送到FRS-IC进行测量。利用FRS-IC的多次反射飞行时间质谱仪，测量了14个基态和两个异核态的质量，相对质量误差下降到$1\times10^{-7}$，包括首次对$^{98}$Cd和$^{97}$Rh进行的直接质量测量。对$^{98}$Cd得到了新的$Q_\mathrm{EC}=5437\pm67$ keV，并且求得了观测到的五个跃迁($0^+\longrightarrow1^+$)的总和Gamow-Teller (GT)强度为$B(\mathrm{GT})=2.94^{+0.32}_{-0.28}$。最新的壳模型研究得到的结果对于更好地理解$N=50$的偶偶同位素中的GT跃迁提供了新的见解。首次确定了$^{94}$Rh的长寿命异核态的激发能为$293\pm21$ keV。结合壳模型计算，这使得可以理解$^{94}$Rh的能级排序。
作者：Ali Mollaebrahimi (1,2,3), Christine Hornung (2), Timo Dickel (2,3), Daler Amanbayev (2), Gabriella Kripko-Koncz (2), Wolfgang R. Plass (2,3), Samuel Ayet San Andr''es (2,3), S"onke Beck (2,3), Andrey Blazhev (4), Julian Bergmann (2), Hans Geissel (2,3), Magdalena G''orska (3), Hubert Grawe (3), Florian Greiner (2), Emma Haettner (3), Nasser Kalantar-Nayestanaki (1), Ivan Miskun (2), Fr''ed''eric Nowacki (5), Christoph Scheidenberger (2,3,6), Soumya Bagchi (2,3,7,8), Dimiter L. Balabanski (9), Ziga Brencic (10), Olga Charviakova (11), Paul Constantin (9), Masoumeh Dehghan (3), Jens Ebert (2), Lizzy Gr"of (2), Oscar Hall (12), Muhsin N. Harakeh (1), Satbir Kaur (8), Anu Kankainen (13,14), Ronja Kn"obel (3), Daria A. Kostyleva (2,3), Natalia Kurkova (15), Natalia Kuzminchuk (3), Israel Mardor (16,17), Dragos Nichita (9,18), Jan-Hendrik Otto (2), Zygmunt Patyk (11), Stephane Pietri (3), Sivaji Purushothaman (3), Moritz Pascal Reiter (12), Ann-Kathrin Rink (2), Heidi Roesch (3,19), Anamaria Spu{a}taru (9,18), Goran Stanic (20), Alexandru State (9,18), Yoshiki K. Tanaka (21), Matjaz Vencelj (10), Helmut Weick (3), John S. Winfield (3), Michael I. Yavor (22), Jianwei Zhao (3) ((1) Nuclear Energy Group, ESRIG, University of Groningen, Groningen, The Netherlands, (2) II. Physikalisches Institut, Justus-Liebig-Universit"at, Gie{ss}en, Germany,(3) GSI Helmholtzzentrum f"ur Schwerionenforschung GmbH, Darmstadt, Germany, (4) Institut f"ur Kernphysik, Universit"at zu K"oln, K"oln, Germany (5) Universit''e de Strasbourg, CNRS, Strasbourg, France (6) Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Center for Heavy Ion Research, Gie{ss}en, Germany,(7) Indian Institute of Technology (Indian School of Mines), Dhanbad, India, (8) Saint Mary's University, Halifax, Canada (9) Extreme Light Infrastructure-Nuclear Physics (ELI-NP), Bucharest, Romania, (10) Jozef Stefan Institute, Ljubljana, Slovenia, (11) National Centre for Nuclear Research, Warszawa, Poland, (12) University of Edinburgh, Edinburgh, United Kingdom,(13) University of Jyv"askyl"a, Jyv"askyl"a, Finland, (14) Helsinki Institute of Physics, Helsinki, Finland, (15) Flerov Laboratory of Nuclear Reactions, Dubna, Russia, (16) Tel Aviv University, Tel Aviv, Israel, (17) Soreq Nuclear Research Center, Yavne, Israel,(18) Doctoral School in Engineering and Applications of Lasers and Accelerators, University Polytechnica of Bucharest, Bucharest, Romania, (19) Technische Universit"at Darmstadt, Darmstadt, Germany, (20) Johannes Gutenberg-Universit"at Mainz, Mainz, Germany, (21) High Energy Nuclear Physics Laboratory, RIKEN, Saitama, Japan, (22) Institute for Analytical Instrumentation, RAS, Petersburg, Russia)
论文ID：2209.13713
分类：Nuclear Experiment
分类简称：nucl-ex
提交时间：2023-04-05