Work

Systematic study of near-yrast band structures in odd-mass Pr125−137 and Pm127−139 isotopes

Year: 2021

Type: article

Abstract: In the present work, the basis space in the triaxial projected shell-model approach is expanded to include three and five quasiparticle configurations for odd-proton systems. This extension allows us to investigate the high-spin band structures observed in odd-proton systems up to and including the second band-crossing region and, as a first major application of this development, the high-spin properties are investigated for odd-mass $^{125\ensuremath{-}137}\mathrm{Pr}$ and $^{127\ensuremath{-}139}\mathrm{Pm}$ isotopes. It is shown that band crossings in the studied isotopes have mixed structures with the first crossing dominated by one-proton coupled to two-neutron configuration for the lighter isotopes which then changes to three-proton configuration with increasing neutron number. Furthermore, $\ensuremath{\gamma}$ bands based on quasiparticle states are also delineated in the present work, and it is predicted that these band structures built on three-quasiparticle configurations become favored in energy for heavier systems in the high-spin region.

Source: Physical Review C

DOI: 10.1103/physrevc.104.044322

Authors: S. Jehangir, G. H. Bhat, N. Rather, J. A. Sheikh, R. Palit