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Low-lying excitations in Ni 72

AutorMorales, A. I.; Benzoni, G.; Watanabe, H.; Nishimura, S.; Browne, F.; Daido, R.; Doornenbal, P.; Taniuchi, R.; Taprogge, J. ; Vajta, Zs.
Fecha de publicación22-mar-2016
EditorAmerican Physical Society
CitaciónPhysical Review C - Nuclear Physics 93: 034328 (2016)
ResumenLow-lying excited states in Ni72 have been investigated in an in-flight fission experiment at the RIBF facility of the RIKEN Nishina Center. The combination of the state-of-the-art BigRIPS and EURICA setups has allowed for a very accurate study of the β decay from Co72 to Ni72, and has provided first experimental information on the decay sequence Fe72→Co72→Ni72 and on the delayed neutron-emission branch Co73→Ni72. Accordingly, we report nearly 60 previously unobserved γ transitions which deexcite 21 new levels in Ni72. Evidence for the location of the so-sought-after (42+),(62+), and (81+) seniority states is provided. As well, the existence of a low-spin β-decaying isomer in odd-odd neutron-rich Co isotopes is confirmed for mass A=72. The new experimental information is compared to simple shell-model calculations including only neutron excitations across the fpg shells. It is shown that, in general, the calculations reproduce well the observed states. ©2016 American Physical Society
DescripciónA. I. Morales et al.; 14 págs.; 9 figs.; 3 tabs.
Versión del editorhttps://doi.org/10.1103/PhysRevC.93.034328
Identificadoresdoi: 10.1103/PhysRevC.93.034328
issn: 1089-490X
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