Evolving collective structures in the transitional nuclei $^{162}\mathrm{W}$ and $^{164}\mathrm{W}$

Evolving collective structures in the transitional nuclei ${}^{162}W$ and ${}^{164}W$

D. T. Joss et al.

Phys. Rev. C 93, 024307 – Published 5 February 2016

Abstract

Excited states in the neutron-deficient nuclides ${}_{74}^{162}W_{88}$ and ${}_{74}^{164}W_{90}$ were investigated by using the $γ$ -ray spectrometer Jurogam. A change in structure is apparent from the first rotational alignments in ${}^{162}W$ and ${}^{164}W$ , whose rotationally aligned bands are interpreted as $ν {(h_{9 / 2})}^{2}$ and $ν {(i_{13 / 2})}^{2}$ configurations, respectively. The level schemes have been extended using recoil (-decay) correlations with the observation of excited collective structures. Configuration assignments have been made on the basis of comparisons of the deduced aligned angular momentum, as a function of rotational frequency, with the predictions of the cranked shell model.