Cluster structures and superdeformation in {sup 28}Si

Journal Article · Thu Oct 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.044316· OSTI ID:21293929

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

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1. RIKEN Nishina Center for Accelerator-Based Science, RIKEN, Wako 351-0198 (Japan)
2. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)
3. 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, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CARBON 12
CLUSTER MODEL
GROUND STATES
MAGNESIUM 24
MOLECULAR DYNAMICS METHOD
OXYGEN 16
PARITY
SILICON 28
SUPERDEFORMED NUCLEI
VARIATIONAL METHODS
WAVE FUNCTIONS