Search for the rare γ-decay mode in 12C

11th International Conference on Clustering Aspects of Nuclear Structure and Dynamics

Tsumura, M.^1 ; Kawabata, T.^1 ; Furuno, T.^1 ; Koshikawa, A.^1 ; Murata, M.^1 ; Morimoto, T.^1 ; Adachi, S.^2 ; Tamii, A.^2 ; Hatanaka, K.^2 ; Ito, T.^2 ; Zenihiro, J.^3 ; Kubono, S.^3 ; Itoh, M.^4 ; Matsuda, Y.^4 ; Maeda, Y.^5 ; Sakaguchi, S.^6 ; Akimune, H.^7 ; Fujimura, H.^8 ; Ou, I.^9 ; Hashimoto, T.^10 ; Iwamoto, C.^11

Department of Physics, Kyoto University, Sakyo, Kyoto

506-8502, Japan^1

Reserch Center for Nuclear Physics, Osaka University, Ibaraki, Osaka

567-0047, Japan^2

RIKEN, Wako, Saitama

351-0198, Japan^3

Cyclotron and Radioisotope Center, Tohoku University, Miyagi, Sendai

980-8578, Japan^4

Miyazaki University, Miyazaki

889-2192, Japan^5

Kyusyu University, Fukuoka

812-8581, Japan^6

Konan University, Hyogo, Kobe

658-8501, Japan^7

Wakayama University, Wakayama

640-8441, Japan^8

Okayama University, Okayama

700-0082, Japan

(10) Institute for Basic Science, Daejeon

34047, Korea, Republic of

(11) Center for Nuclear Study, University of Tokyo, Wako, Saitama

351-0198, Japan^9

关键词: Cyclotron facility;    Decay mode;    Decay probability;    High temperature;    Resonance state;    Solid hydrogen;    Triple alpha reaction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/863/1/012075/pdf
DOI  :  10.1088/1742-6596/863/1/012075

来源: IOP

【 摘 要 】

Excited states in12C nuclei play a very important role in the nucleosynthesis in the universe.12C nuclei are synthesized by the triple α reaction. Normally the triple α process proceeds via the state (Hoyle states) at Ex= 7.65 MeV in12C. However, at high temperature T > 109, the highly excited 3α resonance states such as the state at Ex= 9.64 MeV might play a part of the triple α reaction. Unfortunately, the γ-decay probability of the state has not been determined, therefore we planned to measure1H(12C,12Cp) reaction without measuring γ-rays. The test experiment using the solid hydrogen target and GAGG(Gd3Al2Ga3O12) was recently carried out at the cyclotron facility in RCNP. The results of the test experiment are reported in this paper.