Quadrupole Collectivity Of Neutron-Rich Light Nuclei

摘要

The angular momentum projected Generator Coordinate Method, with the quadrupole moment as collective coordinate and the Gogny force as the effective interaction, is used to describe the properties of the ground state and low-lying excited states of the even-even Magnesium isotopes ~(20-40)Mg. It is found that the ground states of the N=20 ~(32)Mg and N=28 ~(40)Mg nuclei are deformed and therefore the corresponding shell closures are not preserved. Rather good agreement with experimental data for many observables is obtained.