Clustering and triaxial deformations of {sup 40}Ca
- Department of Physics, Kyoto University, Kyoto 606-8502 (Japan)
- Institute of Physics, University of Tsukuba, Tsukuba 305-8571 (Japan)
- Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)
- Research Center of Nuclear Physics, Osaka University, Ibaraki 567-0047 (Japan)
We have studied the positive-parity states of {sup 40}Ca using antisymmetrized molecular dynamics (AMD) and the generator coordinate method (GCM). Imposing two different kinds of constraints on the variational calculation, we have found various kinds of {sup 40}Ca structures such as a deformed-shell structure, as well as {alpha}-{sup 36}Ar and {sup 12}C-{sup 28}Si cluster structures. After the GCM calculation, we obtained a normal-deformed band and a superdeformed band together with their side bands associated with triaxial deformation. The calculated B(E2) values agreed well with empirical data. It was also found that the normal-deformed and superdeformed bands have non-negligible {alpha}-{sup 36}Ar cluster and {sup 12}C-{sup 28}Si cluster components, respectively. This leads to the presence of an {alpha}-{sup 36}Ar higher nodal band occurring above the normal-deformed band.
- OSTI ID:
- 21067802
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 76, Issue 4; Other Information: DOI: 10.1103/PhysRevC.76.044317; (c) 2007 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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