Di-trinucleon cluster resonances in A=6 isobar nuclei
Journal Article
·
· Physical Review. C, Nuclear Physics
- Department of Physics, Konan University, Kobe 658-8501 (Japan)
- Department of Physics, University of Tokushima, Tokushima 770-8502 (Japan)
- Research Center for Nuclear Physics, Osaka University, Osaka 567-0047 (Japan)
- Department of Physics, International Christian University, Tokyo 113-0033 (Japan)
- Kobe Tokiwa College, Kobe 654-0838 (Japan)
- Department of Physics, Kyoto University, Kyoto 606-8502 (Japan)
The di-trinucleon clustering resonances of {sup 3}He+{sup 3}He in {sup 6}Be and t+t in {sup 6}He were studied via the {sup 6}Li({sup 3}He,t {sup 3}He) and {sup 6}Li({sup 7}Li,{sup 7}Be t) reactions at incident energies of 450 and 455 MeV, respectively. A new resonance in {sup 6}Be was found at E{sub x}=18.0{+-}1.2 MeV with a width of 9.2{+-}1.0 MeV in the binary decay channel of {sup 6}Be{yields}{sup 3}He+{sup 3}He. The resonance in {sup 6}He previously reported was also observed at E{sub x}=18.0{+-}1.0 MeV with a width of 9.5{+-}1.0 MeV in the binary decay channel of {sup 6}He {yields}t+t. The branching ratios of the resonances for each binary decay were both 0.7{+-}1.0, which was larger than the branching ratio calculated in a statistical model by two orders of magnitude. The angular correlations measured for t and {sup 3}He particles in the binary decay show a contribution dominantly from the multipolarity of L=1. We suggest that the resonances are the members of the isobaric triplet of the {sup 3}P resonances in A=6 nuclei.
- OSTI ID:
- 20698744
- Journal Information:
- Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 71; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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