## Abstract

A β-decaying high-spin isomer in 96Cd, with a half-life T1/2=0.29+0.11−0.10 s, has been established in a stopped beam rare isotope spectroscopic investigations at GSI (RISING) experiment. The nuclei were produced using the fragmentation of a primary beam of 124Xe on a 9Be target. From the half-life and the observed γ decays in the daughter nucleus,

96Ag, we conclude that the β-decaying state is the long predicted 16+ “spin-gap” isomer. Shell-model calculations, using the Gross-Frenkel interaction and the πν(p1/2,g9/2) model space, show that the isoscalar component of the neutron-proton interaction is essential to explain the origin of the isomer. Core excitations across the N=Z=50 gaps and the Gamow-Teller strength, B(GT) distributions have been studied via large-scale shell-model calculations using the πν(g,d,s) model space to compare with the experimental B(GT) value obtained from the half-life of the isomer.

96Ag, we conclude that the β-decaying state is the long predicted 16+ “spin-gap” isomer. Shell-model calculations, using the Gross-Frenkel interaction and the πν(p1/2,g9/2) model space, show that the isoscalar component of the neutron-proton interaction is essential to explain the origin of the isomer. Core excitations across the N=Z=50 gaps and the Gamow-Teller strength, B(GT) distributions have been studied via large-scale shell-model calculations using the πν(g,d,s) model space to compare with the experimental B(GT) value obtained from the half-life of the isomer.

Original language | English |
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Article number | 172502 |

Number of pages | 5 |

Journal | Physical Review Letters |

Volume | 107 |

Issue number | 17 |

DOIs | |

Publication status | Published - 18 Oct 2011 |

Externally published | Yes |