Identification of spherical states at low energy in the deformed nucleus185Pt

Abstract

The nucleus {sup 185}Pt, which has a strongly deformed ground state and numerous low-lying rotational bands, is shown to possess low-lying excited states which are nonrotational. This is demonstrated through the absence of rotational excitations associated with two low-spin (J= (3) /(2) ; (5) /(2) ) states at excitations between 500 and 600 keV. The implications of these observations for shape changes and shape coexistence in this region are discussed. {copyright} {ital 1998} {ital The American Physical Society}