Second proton and neutron alignments in the doubly-odd nuclei154,156Tb

Abstract

High-spin states in the doubly-odd nuclei {sup 154,156}Tb have been populated in two separate experiments using the {sup 36}S+{sup 124}Sn reaction at different beam energies (160 and 175 MeV). The yrast structures of both nuclei were extended to much higher spin (I{le}48{h_bar}) than previously known and several quasiparticle alignments have been identified. These include the second neutron alignment and a clear delineation of the second proton crossing in {sup 156}Tb. Systematics of these crossings for odd-Z nuclei and comparisons with results of cranked shell model calculations are discussed. thinsp {copyright} {ital 1999} {ital The American Physical Society}