M1 and E2 transition rates from core-excited states in semi-magic 94Ru

A. Ertoprak*, B. Cederwall, C. Qi, M. Doncel, U. Jakobsson, B. M. Nyakó, G. Jaworski, P. Davies, G. de France, I. Kuti, D. R. Napoli, R. Wadsworth, S. S. Ghugre, R. Raut, B. Akkus, H. Al Azri, A. Algora, G. de Angelis, A. Atac, T. BäckA. Boso, E. Clément, D. M. Debenham, Zs Dombrádi, S. Ertürk, A. Gadea, F. Ghazi Moradi, A. Gottardo, T. Hüyük, E. Ideguchi, H. Li, C. Michelagnoli, V. Modamio, J. Nyberg, M. Palacz, C. M. Petrache, F. Recchia, M. Sandzelius, M. Siciliano, J. Timár, J. J. Valiente-Dobón, Z. G. Xiao

*Corresponding author for this work

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Lifetimes of high-spin states have been measured in the semi-magic (N= 50) nucleus 94Ru. Excited states in 94Ru were populated in the 58Ni(40Ca, 4p)94Ru* fusion-evaporation reaction at the Grand Accélérateur National d’Ions Lourds (GANIL) accelerator complex. DSAM lifetime analysis was performed on the Doppler broadened line shapes in energy spectra obtained from γ-rays emitted while the residual nuclei were slowing down in a thick 6mg/cm^2 metallic 58Ni target. In total eight excited-state lifetimes in the angular momentum range I= (13 - 20) ℏ have been measured, five of which were determined for the first time. The corresponding B(M1) and B(E2) reduced transition strengths are discussed within the framework of large-scale shell model calculations to study the contribution of different particle-hole configurations, in particular for analyzing contributions from core-excited configurations.

Original languageEnglish
Article number145
Number of pages9
JournalEuropean Physical Journal A
Issue number9
Publication statusPublished - 3 Sept 2018

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