Shape coexistence in N=14 isotones: 19B, 24Ne and 28Si

Details Shape coexistence in N=14 isotones: 19B, 24Ne and 28Si Shape coexistence in N=14 isotones: 19B, 24Ne and 28Si

2002-12-14

arxiv.org/abs/nucl-th/0212061v1

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures, Proceedings of "Frontiers of Collective Motions (CM2002)" Nov. 6-9, 2002, Aizu-Wakamatsu, Japan

Scientific paper

Shape coexistence problems in N=14 isotones are studied with a microscopic method of antisymmetrized molecular dynamics. The present calculations reproduce features of deformation in 28Si, and predict possible shape coexistence of neutron density in neutron-rich nuclei(19B and 24Ne). We also systematically study the structures of the ground and excited states, and the molecular resonances of 28Si. Besides the shape coexistence in the low-energy region, the results indicate the high-lying levels with $\alpha$-cluster and 12C+16O molecular structures in 28Si, which are consistent with the observed spin-assigned resonances. The resonance states above the threshold energies are connected with the low-lying deformed states from a view point of molecular excitation by discussing inter-cluster wave functions.

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