Fast-timing lifetime measurements of excited states in Cu67

C. R. Niţă et al.
Phys. Rev. C 89, 064314 – Published 25 June 2014

Abstract

The half-lives of the 9/2+, 13/2+, and 15/2+ yrast states in the neutron-rich Cu67 nucleus were determined by using the in-beam fast-timing technique. The experimentally deduced E3 transition strength for the decay of the 9/2+ level to the 3/2 ground state indicates that the wave function of this level might contain a collective component arising from the coupling of the odd proton p3/2 with the 3 state in Ni66. Theoretical interpretations of the 9/2+ state are presented within the particle-vibration weak-coupling scheme involving the unpaired proton and the 3 state from Ni66 and within shell-model calculations with a Ni56 core using the jj44b residual interaction. The shell model also accounts reasonably well for the other measured electromagnetic transition probabilities.

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  • Received 16 September 2013
  • Revised 30 April 2014

DOI:https://doi.org/10.1103/PhysRevC.89.064314

©2014 American Physical Society

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Vol. 89, Iss. 6 — June 2014

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