EMMI workshop: Neutron Matter in Astrophysics: From Neutron Stars to the r-Process

The abundances of r-process nucleosynthesis in the mass A=130 region are largely affected by the nuclear structure properties around the N=82 magic number. Some simulations show a better description of the abundances if a shell quenching of N=82 is assumed. In addition, the anomalous behavior of the experimental 2+ excitation energies in neutron rich Cd isotopes has been interpreted as an indication of a reduction of the shell gap in this region. In this work we will study the spectroscopic properties of even-even Cadmium isotopes from N=50 to N=82 shells with beyond mean field methods. Our results reproduce nicely both the 2+ energies and B(E2) transitions without adjusting any parameter of the nucleon-nucleon force (Gogny D1S). Furthermore, we do not observe N=82 shell quenching and the anomalous behavior of the 128Cd can be interpreted in terms slight deformation effects.