Coexistence phenomena in medium mass n⋍z nuclei: A comprehensive understanding

Abstract

Recently we investigated exotic phenomena in proton-rich nuclei in the A=70 mass region bringing insights into fundamental symmetries and interactions and making robust predictions on characteristics required by the astrophysical scenarios on the rp-process path. Our studies revealed coexistence phenomena which dominate the structure and dynamics of exotic nuclei. Tiny effects induced by isospin mixing have been self-consistently investigated. The interplay between isospin-symmetry-breaking and shape-coexistence effects on isospin-related phenomena as well as exotic weak interaction decays have been explored in the frame of the beyond-mean-field complex Excited Vampir variational model. We used an adequate model space and the effective interaction was derived from a G-matrix starting from the charge-dependent Bonn CD potential. Results concerning the influence of shape coexistence and mixing on the structure and exotic β-decays of N⋍Z nuclei will be presented.