抄録
A 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.
本文言語 | 英語 |
---|---|
論文番号 | 132501 |
ジャーナル | Physical review letters |
巻 | 112 |
号 | 13 |
DOI | |
出版ステータス | 出版済み - 4月 1 2014 |
外部発表 | はい |
!!!All Science Journal Classification (ASJC) codes
- 物理学および天文学(全般)