Reinvestigation of the excited states in the proton emitter $^{151}\mathrm{Lu}$: Particle-hole excitations across the $N=Z=64$ subshell

Reinvestigation of the excited states in the proton emitter ${}^{151}{Lu}$ : Particle-hole excitations across the $N = Z = 64$ subshell

F. Wang et al.

Phys. Rev. C 96, 064307 – Published 6 December 2017; Erratum Phys. Rev. C 97, 029902 (2018)

Abstract

The excited states of the proton emitter ${}^{151}{Lu}$ were reinvestigated in a recoil-decay tagging experiment at the Accelerator Laboratory of the University of Jyväskylä (JYFL). The level scheme built on the ground state of ${}^{151}{Lu}$ was updated with five new $γ$ -ray transitions. Large-scale shell model calculations were carried out in the model space consisting of the neutron and proton orbitals $0 g_{7 / 2}$ , $1 d_{5 / 2}$ , $1 d_{3 / 2}$ , $2 s_{1 / 2}$ , and $0 h_{11 / 2}$ with the optimized monopole interaction in order to interpret the experimental level scheme of ${}^{151}{Lu}$ . It is found that the excitation energies of states above the $27 / 2^{-}$ and $23 / 2^{+}$ isomeric levels in ${}^{151}{Lu}$ can be sensitive to excitations from $g_{7 / 2}$ and $d_{5 / 2}$ to single-particle orbitals above $N = Z = 64$ .