Darmstadt 2016 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 58: Structure and Dynamics of Nuclei XI
HK 58.2: Talk
Thursday, March 17, 2016, 17:00–17:15, S1/01 A03
Study of multiple isomeric states in 95Ag via electron and gamma-ray spectroscopy — •Kevin Moschner1, Andrey Blazhev1, Plamen Boutachkov2, Paul Davies3, Magda Górska2, Hubert Grawe2, Robert Wadsworth3, and Nigel Warr1 — 1Institut für Kernphysik - Universität zu Köln — 2GSI Darmstadt — 3Department of Physics, University of York
Recently, we studied isomeric decays of 95Ag at the RIKEN Nishina Center using a fragmentation reaction of 124Xe on a 9Be target. The separated and identified reaction products were implanted in the modified SIMBA Silicon calorimeter, which was surrounded by the EURICA Germanium array, to measure the isomer and particle decays. The half-lives of all three isomeric states previously identified by Döring [Phys. Rev. C 68, 034306 (2003)] were measured from the analysis of the gamma-ray and conversion-electron (CE) data. Analysis of coincident gamma-rays and CE-gamma-ray data was used to verify the published level scheme. We have performed new shell-model calculations in a larger model space pn(f5/2, p3/2, p1/2, g9/2) using a modified interaction. These calculations provide an improved description of the isomers and the reduced transition rates extracted from the experimental half-lives. While for the isomeric states (1/2−) and (23/2+) the choice of E3 for the depopulating transitions is appropriate, the comparison of the shell-model to the experimental results is used as a basis to suggest a change of the spin and parity assignment of the high-spin isomer in with the former assignment of (37/2+).