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1p3/2 proton-hole state in Sn 132 and the shell structure along N=82

Autor Taprogge, J. ; Jungclaus, Andrea ; Grawe, H.; Nishimura, S.; Gadea, Andrés ; Montaner-Pizá, A. ; Podolyák, Zs.; Wendt, A.
Fecha de publicación 1-abr-2014
EditorAmerican Physical Society
Citación Physical Review Letters 112: 132501 (2014)
ResumenA low-lying state in In82131, the one-proton hole nucleus with respect to double magic Sn132, was observed by its γ decay to the Iπ=1/2- β-emitting isomer. We identify the new state at an excitation energy of Ex=1353keV, which was populated both in the β decay of Cd13183 and after β-delayed neutron emission from Cd13284, as the previously unknown πp3/2 single-hole state with respect to the Sn132 core. Exploiting this crucial new experimental information, shell-model calculations were performed to study the structure of experimentally inaccessible N=82 isotones below Sn132. The results evidence a surprising absence of proton subshell closures along the chain of N=82 isotones. The consequences of this finding for the evolution of the N=82 shell gap along the r-process path are discussed. © 2014 American Physical Society.
Descripción 5 pags. ; 3 figs. ; PACS numbers: 23.40.-s, 21.10.Pc, 27.60.+j, 21.60.Cs ; Taprogge, J., et al.
URI http://hdl.handle.net/10261/109995
Identificadoresissn: 0031-9007
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