Systematic study of many-particle and many-hole states in and around the “island of inversion”

摘要

Deformation and many particle and many hole configurations in the island of inversion are investigated with antisymmetrized molecular dynamics (AMD). The result suggests the coexistence of many particle and many hole configurations with different deformation at small excitation energy. Detailed study of the excitation spectrum is performed for ~(33)Mg. We suggest the negative-parity assignment for the ground state, and the coexistence of many particle hole states at very small excitation energy is predicted.