Cluster-shell competition in light nuclei

N. Itagaki, S. Aoyama, S. Okabe, K. Ikeda
2004 Physical Review C  
We demonstrate whether the cluster structure dissolves or remains when the shell-model-like model space is introduced in addition to the cluster model space in light nuclei. Although the binding energies of 8 Be, 10 Be, and 10 B become larger by about 1-2 MeV by adding shell-model-like basis states to the ␣ + ␣ + N + N +¯basis states, the ␣ -␣ structure is a dominant configuration of the ground states. However, ␣-breaking wave functions strongly mix in 12 C, and the decrease of the energy from
more » ... of the energy from the 3␣ configuration by about 6 MeV is a clue to resolving a long-standing problem of the binding energies of 12 C and 16 O. The improved version of antisymmetrized molecular dynamics (AMD), AMD superposition of selected snapshots (AMD triple-S), is used to show the cluster-shell competition of these nuclei.
doi:10.1103/physrevc.70.054307 fatcat:iflljowvv5a7zlcqpqxqvn74ty