Potential energy surface calculations of nuclear shape transitions and shape coexistence in176,178,180Pt

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Abstract
Ground-state potential energy surfaces for 176,178,180Pt have been calculated by using the Woods-Saxon single-particle potential and the Strutinsky renormalisation procedure. These potential energy surfaces predict a ground-state shape change from a large prolate deformation for 178,180Pt ( beta 2 approximately=0.24) to a smaller triaxial deformation for 176Pt with a second minimum developing at large prolate deformation ( beta approximately=0.23) above the 4+ state. There is excellent agreement between these independent calculations and recent measurements of the yrast bands in 176,178Pt.