Abstract
Shape transitions and shape coexistence in the region are studied in a unified view with state-of-the-art beyond-self-consistent mean-field methods based on the Gogny D1S interaction. Beyond-mean-field effects are taken into account through the exact angular-momentum and particle-number restoration and the possibility of axial and nonaxial shape mixing. The results of the low-lying properties of these isotopes are in good agreement with the experimental data when the triaxial degree of freedom is included. Shape transitions from axial-oblate () to triaxial-prolate () and from spherical-triaxial () to axial-oblate () ground states are obtained. Additionally, low-lying excited states and quasi- bands are found showing the richness of the collective structure in this region.
2 More- Received 22 July 2014
- Revised 19 August 2014
DOI:https://doi.org/10.1103/PhysRevC.90.034306
©2014 American Physical Society