Rotation-driven prolate-to-oblate shape phase transition in 190W: A projected shell model study

Abstract

A shape phase transition is demonstrated to occur in 190W by applying the Projected Shell Model, which goes beyond the usual mean-field approximation. Rotation alignment of neutrons in the high-j, i_{13/2} orbital drives the yrast sequence of the system, changing suddenly from prolate to oblate shape at angular momentum 10$\hslash$. We propose observables to test the picture.

Comments: 9 pages, 3 figures, accepted for publication in Phys. Lett. B