Title: 1p(3/2) Proton-Hole State in Sn-132 and the Shell Structure Along N=82
Authors: Taprogge, J ×
Jungclaus, A
Grawe, H
Nishimura, S
Doornenbal, P
Lorusso, G
Simpson, G. S
Soederstroem, P. -A
Sumikama, T
Xu, Z. Y
Baba, H
Browne, F
Fukuda, N
Gernhaeuser, R
Gey, G
Inabe, N
Isobe, T
Jung, H. S
Kameda, D
Kim, G. D
Kim, Y. -K
Kojouharov, I
Kubo, T
Kurz, N
Kwon, Y. K
Li, Z
Sakurai, H
Schaffner, H
Steiger, K
Suzuki, H
Takeda, H
Vajta, Zs
Watanabe, H
Wu, J
Yagi, A
Yoshinaga, K
Benzoni, G
Boenig, S
Chae, K. Y
Coraggio, L
Covello, A
Daugas, J. -M
Drouet, F
Gadea, A
Gargano, A
Ilieva, S
Kondev, F. G
Kroell, T
Lane, G. J
Montaner-Piza, A
Moschner, K
Muecher, D
Naqvi, F
Niikura, M
Nishibata, H
Odahara, A
Orlandi, Riccardo
Patel, Z
Podolyak, Zs
Wendt, A #
Issue Date: 2014
Publisher: American Physical Society
Series Title: Physical Review Letters vol:112 issue:13 pages:1-5
Abstract: A low-lying state in 131In82, the one-proton hole nucleus with respect to double magic 132Sn, was
observed by its γ decay to the Iπ ¼ 1=2− β-emitting isomer. We identify the new state at an excitation
energy of Ex ¼ 1353 keV, which was populated both in the β decay of 131Cd83 and after β-delayed neutron
emission from 132Cd84, as the previously unknown πp3=2 single-hole state with respect to the 132Sn core.
Exploiting this crucial new experimental information, shell-model calculations were performed to study the
structure of experimentally inaccessible N ¼ 82 isotones below 132Sn. The results evidence a surprising
absence of proton subshell closures along the chain of N ¼ 82 isotones. The consequences of this finding
for the evolution of the N ¼ 82 shell gap along the r-process path are discussed.
ISSN: 0031-9007
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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