Cluster structures and superdeformation in {sup 28}Si
- RIKEN Nishina Center for Accelerator-Based Science, RIKEN, Wako 351-0198 (Japan)
- Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)
- Creative Research Initiative 'Sousei', Hokkaido University, Sapporo 001-0021 (Japan)
We have studied positive-parity states of {sup 28}Si using antisymmetrized molecular dynamics and multiconfiguration mixing with constrained variation. Applying constraints to the cluster distance and the quadrupole deformation of the variational calculation, we have obtained basis wave functions that have various structures such as {alpha}-{sup 24}Mg and {sup 12}C-{sup 16}O cluster structures as well as deformed structures. Superposing those basis wave functions, we have obtained a oblate ground-state band, a {beta} vibration band, a normal-deformed prolate band, and a superdeformed band. It is found that the normal-deformed and superdeformed bands contain large amounts of the {sup 12}C-{sup 16}O and {alpha}-{sup 24}Mg cluster components, respectively. The results also suggest the presence of two excited bands with the developed {alpha}-{sup 24}Mg cluster structure, where the intercluster motion and the {sup 24}Mg-cluster deformation play important roles.
- OSTI ID:
- 21293929
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 80, Issue 4; Other Information: DOI: 10.1103/PhysRevC.80.044316; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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