Evidence for a beta-decaying 1/2- isomer in 71Ni

Abstract

We report on the investigation of the population mechanism for the 454-KeV level in 71Cu. This level was identified for the first time in a recent Coulomb excitation measurement with a radioactive beam of 71Cu. The selective nature of the Coulomb-excitation process as well as nuclear-structure considerations constrain the possible spin values for the newly observed state to Ipi=1/2-. A re-examination of the data set obtained in a beta-decay study at the LISOL separator revealed that this state is also populated in the decay of 71Ni, most probably by direct feeding from a newly identified 1/2- beta-decaying isomer having a T1/2=2.34(25) s. In this paper we investigate the proposed scenario by reanalyzing the beta-gamma and gamma-gamma coincidences obtained in the beta-decay study at LISOL.

7 pages,6 figures, PRC preprint

References in corpus (1)

• Shape Isomerism at N = 40: Discovery of a Proton Intruder in 67Co

Cited by in corpus (5)

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• Nuclear structure study around Z=28
• Probing the role of proton cross-shell excitations in 70Ni using nucleon knockout reactions