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The role of core excitations in the structure and decay of the 16 + spin-gap isomer in 96 Cd

P.J. Davies, H. Grawe, K. Moschner, A. Blazhev, R. Wadsworth, P. Boutachkov, F. Ameil, A. Yagi, H. Baba, T. Bäck, M. Dewald, P. Doornenbal (+36 others)
2017 Physics Letters B  

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Editor: V. Metag Keywords: β-decay β p-decay γ -ray spectroscopy Half-life Shell-model WKB The first evidence for β-delayed proton emission from the 16 + spin gap isomer in 96 Cd is presented. The data were obtained from the Rare Isotope Beam Factory, at the RIKEN Nishina Center, using the BigRIPS spectrometer and the EURICA decay station. β p branching ratios for the ground state and 16 + isomer have been extracted along with more precise lifetimes for these states and the lifetime for the
more » ... nd state decay of 95 Cd. Large scale shell model (LSSM) calculations have been performed and WKB estimates made for = 0, 2, 4 proton emission from three resonance-like states in 96 Ag, that are populated by the β decay of the isomer, and the results compared to the new data. The calculations suggest that = 2 proton emission from the resonance states, which reside ∼5 MeV above the proton separation energy, dominates the proton decay. The results highlight the importance of core-excited wavefunction components for the 16 + state.
doi:10.1016/j.physletb.2017.02.013 fatcat:yehpjxrujngg7lewaml54knek4
DOAJ
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P.J. Davies, H. Grawe, K. Moschner, A. Blazhev, R. Wadsworth, P. Boutachkov, F. Ameil, A. Yagi, H. Baba, T. Bäck, M. Dewald, P. Doornenbal, T. Faestermann, A. Gengelbach, J. Gerl, R. Gernhäeuser, S. Go, M. Górska, E. Gregor, T. Isobe, D.G. Jenkins, H. Hotaka, J. Jolie, I. Kojouharov, N. Kurz, M. Lewitowicz, G. Lorusso, L. Maier, E. Merchan, F. Naqvi, H. Nishibata, D. Nishimura, S. Nishimura, F. Nowacki, N. Pietralla, H. Schaffner, P.-A. Söderström, H.S. Jung, K. Steiger, T. Sumikama, J. Taprogge, P. Thöle, N. Warr, H. Watanabe, V. Werner, Z.Y. Xu, K. Yoshinaga, Y. Zhu. "The role of core excitations in the structure and decay of the 16 + spin-gap isomer in 96 Cd." Physics Letters B (2017) 474-479