Trinucleon cluster structure at high-excitation energies in A=6 nuclei |
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| Authors: | H. Akimune T. Yamagata S. Nakayama M. Fujiwara K. Fushimi K. Hara K. Y. Hara K. Ichihara K. Kawase K. Matsui K. Nakanishi A. Shiokawa M. Tanaka H. Utsunomiya M. Yosoi |
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| Affiliation: | (1) Department of Physics, Konan University, Kobe, Japan;(2) Department of Physics, University of Tokushima, Tokushima, Japan;(3) Research Center for Nuclear Physics, Osaka University, Osaka, Japan;(4) Kobe Tokiwa College, Kobe, Japan;(5) Department of Physics, Kyoto University, Kyoto, Japan |
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| Abstract: | Trinucleon molecular structures in 6He and 6Be were investigated by using the 6Li(7Li, 7Be)6He reaction at 455 MeV and 6Li(3He, t)6Be reaction at 450 MeV, respectively. Binary decays into t + t from a broad state at E x =18.0±1.0 MeV in 6He and into 3He + 3He from one at E x =18.0±1.2 MeV in 6Be, respectively, were observed by measuring trinucleon cluster decays in coincidence with reaction particles. The branching ratios for binary decay were estimated to be about 0.7 for 6He and 6Be. These large branching ratios show that a trinucleon cluster state exists as an isobaric partner around E x =18 MeV in 6He and 6Be. |
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