{alpha}-clustering and triaxial deformations in {sup 40}Ca

Journal Article · Fri Nov 30 04:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2827267· OSTI ID:21039472

Taniguchi, Yasutaka ^[1]; Kimura, Masaaki ^[2]; Kanada-En'yo, Yoshiko ^[3]; Horiuchi, Hisashi ^[4]

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1. Department of Physics, Kyoto University, Kyoto 606-8502 (Japan)
2. Institute of Physics, Tsukuba University, Tsukuba 305-8571 (Japan)
3. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)
4. Research Center for 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 contain {alpha}-{sup 36}Ar and {sup 12}C-{sup 28}Si cluster structure components, respectively. This leads to the presence of an {alpha}-{sup 36}Ar higher-nodal band occurring above the normal-deformed band.

• OSTI ID: 21039472
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 961; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 36
CALCIUM 40
CARBON 12
CLUSTER MODEL
GENERATOR-COORDINATE METHOD
MOLECULAR DYNAMICS METHOD
NUCLEAR DEFORMATION
NUCLEAR STRUCTURE
PARITY
SILICON 28
SUPERDEFORMED NUCLEI
VARIATIONAL METHODS