LABORATORI NAZIONALI DI LEGNARO
The study of the shape evolution, shape coexistence and shape mixing in nuclei [1] from a microscopic point of view has been performed thoroughly with mean field approaches based on energy density functionals. However, it is mandatory to include beyond mean effects to compare with experimental spectra. Hence, symmetry restorations as well as shape mixing included within the generator coordinate method are the perfect tools to study these phenomena [2]. In the last few years, these methods have been implemented with Skyrme [3], relativistic [4] and Gogny [5] functionals including the triaxial degree of freedom. However, due to the high computational cost of such calculations, very few of them have been performed so far, usually focused on individual nuclei rather than isotopic chains. In this contribution, beyond mean field calculations including exact particle number and angular momentum restoration and shape mixing of axial and non-axial shapes with the Gogny force willbe presented. In particular, results for the shape evolution of the Kr isotopes, both neutron rich and neutron deficient [6] will be shown and compared to the available experimental data.

DATA: 08-07-2014