Properties of gamma-decaying isomers in the Sn-100 region populated in fragmentation of a Xe-124 beam

G. Haefner, K. Moschner,A. Blazhev,P. Boutachkov,P. J. Davies,R. Wadsworth,F. Ameil,H. Baba,T. Back,M. Dewald,P. Doornenbal,T. Faestermann, A. Gengelbach,J. Gerl, R. Gernhaeuser,S. Go, M. Gorska,H. Grawe,E. Gregor, H. Hotaka,T. Isobe,D. G. Jenkins,J. Jolie,H. S. Jung, I Kojouharov,N. Kurz, M. Lewitowicz,G. Lorusso,R. Lozeva,E. Merchan, F. Naqvi,H. Nishibata,D. Nishimura,S. Nishimura, N. Pietralla, H. Schaffner,P-A Soderstrom, K. Steiger,T. Sumikama,J. Taprogge,P. Thoele, H. Watanbe, N. Warr,V Werner,Z. Y. Xu,A. Yagi, K. Yoshinaga,Y. Zhu

Physical Review C（2019）

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摘要

A systematic study was performed of microsecond gamma-decaying isomers around Sn-100 produced in a fragmentation reaction of a Xe-124 beam at 345 MeV/u at the Radioactive Ion Beam Factory of the RIKEN Nishina Center in Saitama, Japan. Half-lives of isomeric states in that region were remeasured allowing us to improve the currently available experimental information. Reduced transition probabilities were deduced and compared to shell-model calculations in various model spaces. The recently reported low-energy transitions in Rh-92 and Ag-96 were remeasured with improved precision. Additionally, experimental information on isomeric ratios, including five new ones, were extracted and compared to a previous experimental study and the sharp cutoff model of fragmentation reaction.

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