Abstract :
Light nuclei with two particles (neutron or proton) or two holes outside a core have been studied in a two-particle RPA model with the Gogny and a zero range density dependent effective interactions. It has been shown that the model is able to consistently describe 6He, 14C, 12Be and 11Li. The case of 12Be, described either as a 10Be-core plus two neutrons or as the core of 14Be, has been discussed in more details and a quasi boson expansion of the ground state wave function has been performed. To get consistent results in the two schemes one has suggested the same inversion of 2s and View the MathML source shells in the n+12Be average potential as known in the n+10Be one. In the same model, a T=0 neutron-proton zero range effective interaction has been proposed to describe the 1+, T=0 states in 14N and discussed in 10B.
