Negative parity states of {sup 11}B and {sup 11}C and the similarity with {sup 12}C

Journal Article · Thu Feb 15 00:00:00 EST 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.024302· OSTI ID:20991003

Kanada-En'yo, Yoshiko ^[1]

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

The negative parity states of {sup 11}B and {sup 11}C were studied based on the calculations of antisymmetrized molecular dynamics (AMD). The calculations reproduced well the experimental strengths of Gamov-Teller (GT), M1, and monopole transitions. We especially focused on the 3/2{sub 3}{sup -} and 5/2{sub 2}{sup -} states for which GT transition strengths were recently measured. The weak M1 and GT transitions for 3/2{sub 3}{sup -} in {sup 11}B and {sup 11}C are described by a well-developed cluster structure of 2{alpha}+t and 2{alpha}+{sup 3}He, respectively, while the strong transitions for 5/2{sub 2}{sup -} is characterized by an intrinsic spin excitation with no cluster structure. It was found that the 3/2{sub 3}{sup -} state is a dilute cluster state, and its features are similar to those of {sup 12}C(0{sub 2}{sup +}) which is considered to be a gas state of 3{alpha} clusters.

• OSTI ID: 20991003
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 75, Issue 2; Other Information: DOI: 10.1103/PhysRevC.75.024302; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BORON 11
CARBON 11
CARBON 12
EXCITATION
HELIUM 3
MOLECULAR DYNAMICS METHOD
MONOPOLES
PARITY
SPIN