Abstract
Prompt and delayed rays from have been identified using the recoil-decay tagging, isomer tagging, and recoil gating techniques, resulting in extensive level schemes for both nuclei. Excitation energies of the isomeric states have been established and oblate strongly coupled bands built on them have been observed. The nearly spherical ground-state bands appear to be crossed by more oblate-deformed low-lying structures. The properties of the bands feeding the intruder states indicate some structural change between and . The deformation associated with each of these states has been extracted from total Routhian surface calculations which also reveal the development of prolate minima with decreasing neutron number. ratios have been measured for the observed strongly coupled bands in order to resolve the intrinsic excitations. The observed quasiparticle structures in and high-spin isomers both in and are interpreted based on the coupling of the odd proton to the even-even core.
11 More- Received 2 December 2003
DOI:https://doi.org/10.1103/PhysRevC.69.064326
©2004 American Physical Society