Superdeformation and clustering in {sup 40}Ca studied with antisymmetrized molecular dynamics

Journal Article · Thu Dec 15 04:00:00 EST 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.064322· OSTI ID:20771098

Kanada-En'yo, Y; Kimura, M ^[1]

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1. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)

Deformed states in {sup 40}Ca are investigated with a method of antisymmetrized molecular dynamics. Above the spherical ground state, rotational bands arise from a normal deformation and a superdeformation as well as an oblate deformation. The calculated energy spectra and E2 transition strengths in the superdeformed band reasonably agree to the experimental data of the superdeformed band starting from the 0{sub 3}{sup +} state at 5.213 MeV. By the analysis of single-particle orbits, it is found that the superdeformed state has particle-hole nature of an 8p-8h configuration. One of new findings is parity asymmetric structure with {sup 12}C+{sup 28}Si-like clustering in the superdeformed band. We predict that {sup 12}C+{sup 28}Si molecular bands may be built above the superdeformed band due to the excitation of intercluster motion. They are considered to be higher nodal states of the superdeformed state. We also suggest negative-parity bands caused by the parity asymmetric deformation.

• OSTI ID: 20771098
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 72; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
CALCIUM 40
CARBON 12
E2-TRANSITIONS
ENERGY SPECTRA
EXCITATION
GROUND STATES
MEV RANGE
MOLECULAR DYNAMICS METHOD
NUCLEAR DEFORMATION
PARITY
PARTICLE-HOLE MODEL
ROTATIONAL STATES
SILICON 28
SINGLE-PARTICLE MODEL
SUPERDEFORMED NUCLEI