Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-05-20
Prog.Theor.Phys.117:655-680,2007; Erratum-ibid.121:895-895,2009
Physics
Nuclear Physics
Nuclear Theory
6 figures, submitted to Physical Review C
Scientific paper
10.1143/PTP.117.655 10.1143/PTP.
We studied the ground and excited states of $^{12}$C based on variational calculations after spin-parity projection in a framework of antisymmetrized molecular dynamics(AMD). The calculations systematically reproduce various experimental data. It was found that the sub-shell closure and SU(3)-limit $3\alpha$ cluster components are contained in the ground state, while various $3\alpha$ cluster structures develop in the excited states. We discussed effects of $\alpha$ breaking and show the importance of coexistence of the cluster and shell-model-like aspects.
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