Abstract

The nuclear structure of the odd-mass $^{69}\mathrm{Zn}$ and $^{71}\mathrm{Zn}$ isotopes, with one hole or one particle outside the $N=40$ subshell closure, has been investigated by measuring the lifetime of excited states using the recoil distance Doppler-shift method. The nuclei of interest were produced in a deep-inelastic reaction in inverse kinematics with a $^{238}\mathrm{U}$ beam impinging on a $^{70}\mathrm{Zn}$ target. Single-particle and collective states were found to coexist at low energy in $^{69}\mathrm{Zn}$ and $^{71}\mathrm{Zn}$.

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