The ground state and the odd-parity spectrum of 40Ca

Abstract

The energies and eigenvectors of the odd-parity states of 40Ca are given in the framework of the particle-hole model, using recently determined single-particle energies. The wave function of the ground state of 40Ca is evaluated within the framework of the quasi-boson approximation. It appears to be only 30% a pure shell-model state. Comparison is made between the theoretical occupation numbers and the experimental spectroscopic factors obtained in one-nucleon transfer reactions.