Various facets of shape coexistence in neutron-rich nuclei within a beyond-mean-field approach

Multifaceted impact of shape coexistence and mixing on 96 Y to 96 Zr and 92 Rb to 92 Sr allowed and first-forbidden β − decay was investigated within the beyond-mean-field complex Excited Vampir variational model. The structure of the parent and daughter states and the β-decay properties have been studied using the effective interaction obtained from the G matrix derived from the charge-dependent Bonn CD potential and a large model space. Various effects of shape coexistence and mixing on the properties of the involved states and comparison to the available experimental data will be presented.