Journal article

Authors list: Mollaebrahimi, Ali; Hornung, Christine; Dickel, Timo; Amanbayev, Daler; Kripko-Koncz, Gabriella; Plass, Wolfgang R.; San Andres, Samuel Ayet; Beck, Sonke; Blazhev, Andrey; Bergmann, Julian; Geissel, Hans; Gorska, Magdalena; Grawe, Hubert; Greiner, Florian; Haettner, Emma; Kalantar-Nayestanaki, Nasser; Miskun, Ivan; Nowacki, Frederic; Scheidenberger, Christoph; Bagchi, Soumya; Balabanski, Dimiter L.; Brencic, Ziga; Charviakova, Olga; Constantin, Paul; Dehghan, Masoumeh; Ebert, Jens; Groef, Lizzy; Hall, Oscar; Harakeh, Muhsin N.; Kaur, Satbir; Kankainen, Anu; Knoebel, Ronja; Kostyleva, Daria A.; Kurkova, Natalia; Kuzminchuk, Natalia; Mardor, Israel; Nichita, Dragos; Otto, Jan-Hendrik; Patyk, Zygmunt; Pietri, Stephane; Purushothaman, Sivaji; Reiter, Moritz Pascal; Rink, Ann-Kathrin; Roesch, Heidi; Spataru, Anamaria; Stanic, Goran; State, Alexandru; Tanaka, Yoshiki K.; Vencelj, Matjaz; Weick, Helmut; Winfield, John S.; Yavor, Michael I.; Zhao, Jianwei

Publication year: 2023

Journal: Physics Letters B

Volume number: 839

ISSN: 0370-2693

eISSN: 1873-2445

Open access status: Gold

DOI Link: https://doi.org/10.1016/j.physletb.2023.137833

Publisher: Elsevier

Abstract: 
Direct mass measurements of neutron-deficient nuclides around the N = 50 shell closure below 100Sn were performed at the FRS Ion Catcher (FRS-IC) at GSI, Germany. The nuclei were produced by projectile fragmentation of 124Xe, separated in the fragment separator FRS and delivered to the FRS-IC. The masses of 14 ground states and two isomers were measured with relative mass uncertainties down to 1 x 10-7 using the multiple-reflection time-of-flight mass spectrometer of the FRS-IC, including the first direct mass measurements of 98Cd , 97Rh. A new QEC = 5437 +/- 67 keV was obtained for 98Cd, resulting in a summed Gamow-Teller (GT) strength for the five observed transitions (0+ --> 1+) as B(GT) = 2.94+0.32 -0.28. Investigation of this result in state-of-the-art shell model approaches accounting for the first time experimentally observed spectrum of GT transitions points to a perfect agreement for N = 50 isotones. The excitation energy of the long-lived isomeric state in 94Rh was determined for the first time to be 293 +/- 21 keV. This, together with the shell model calculations, allows the level ordering in 94Rh to be understood.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.

Harvard Citation style: Mollaebrahimi, A., Hornung, C., Dickel, T., Amanbayev, D., Kripko-Koncz, G., Plass, W., et al. (2023) Studying Gamow-Teller transitions and the assignment of isomeric and ground states at N=50, Physics Letters B, 839, Article 137833. https://doi.org/10.1016/j.physletb.2023.137833

APA Citation style: Mollaebrahimi, A., Hornung, C., Dickel, T., Amanbayev, D., Kripko-Koncz, G., Plass, W., San Andres, S., Beck, S., Blazhev, A., Bergmann, J., Geissel, H., Gorska, M., Grawe, H., Greiner, F., Haettner, E., Kalantar-Nayestanaki, N., Miskun, I., Nowacki, F., Scheidenberger, C., ...Zhao, J. (2023). Studying Gamow-Teller transitions and the assignment of isomeric and ground states at N=50. Physics Letters B. 839, Article 137833. https://doi.org/10.1016/j.physletb.2023.137833