Shape Coexistence in Very Neutron-Deficient Pt Isotopes

摘要

Yrast bands in sup 176 Pt(N = 98) and sup 178 Pt have been identified. The level scheme of sup 176 Pt changes from a quasi-vibrational pattern to that of a well deformed rotor, at very low spins, a behaviour similar to that attributed to shape coexistence in the light Hg isotopes. Analysis of the sup 176 Pt- sup 188 Pt yrast bands supports a shape coexistence interpretation, the excitation energy of the intruder state behaving as predicted. (Atomindex citation 17:071528)