Abstract
The neutron-rich nuclei 32Mg and 30Ne are studied using a new version of antisymmetrized molecular dynamics (AMD). Due to the use of a deformed Gaussian as the single particle wave packet, the description of the deformation properties of Mg isotopes is drastically improved, and l·s force is accounted for more largely and sufficiently. After the angular momentum projection, 32Mg and 30Ne have deformed ground states, and the experimental data for 32Mg are reproduced with reasonable accuracy. The deformation of the mean field is found to be essential to describe these nuclei. The ground states of these nuclei have neutron 2p2h structure. In 30Ne, the cluster-like and the mean-field-like structures coexist. The ground state of 32Mg has a mean-field-like structure. In the vicinity of the ground state, this nucleus is expected to have excited states with cluster-like structure that possesses the neutron 4p4h configuration.
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