Physics Letters B (Jun 2021)
First experimental determination of the radiative-decay probability of the 31− state in 12C for estimating the triple alpha reaction rate in high temperature environments
- M. Tsumura,
- T. Kawabata,
- Y. Takahashi,
- S. Adachi,
- H. Akimune,
- S. Ashikaga,
- T. Baba,
- Y. Fujikawa,
- H. Fujimura,
- H. Fujioka,
- T. Furuno,
- T. Hashimoto,
- T. Harada,
- M. Ichikawa,
- K. Inaba,
- Y. Ishii,
- N. Itagaki,
- M. Itoh,
- C. Iwamoto,
- N. Kobayashi,
- A. Koshikawa,
- S. Kubono,
- Y. Maeda,
- Y. Matsuda,
- S. Matsumoto,
- K. Miki,
- T. Morimoto,
- M. Murata,
- T. Nanamura,
- I. Ou,
- S. Sakaguchi,
- A. Sakaue,
- M. Sferrazza,
- K.N. Suzuki,
- T. Takeda,
- A. Tamii,
- K. Watanabe,
- Y.N. Watanabe,
- H.P. Yoshida,
- J. Zenihiro
Affiliations
- M. Tsumura
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan; Corresponding author.
- T. Kawabata
- Department of Physics, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Y. Takahashi
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- S. Adachi
- Department of Physics, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- H. Akimune
- Department of Physics, Konan University, Okamoto, Higashi-nada, Kobe, Hyogo 658-8501, Japan
- S. Ashikaga
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- T. Baba
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- Y. Fujikawa
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- H. Fujimura
- School of Medicine, Wakayama Medical University, Kimiidera, Wakayama 641-8509, Japan
- H. Fujioka
- Department of Physics, Tokyo Institute of Technology, Ookayama, Meguro, Tokyo 152-8550, Japan
- T. Furuno
- Department of Physics, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- T. Hashimoto
- Rare Isotope Science Project, Institute for Basic Science, Somunsanseong-gil, Yuseong-gu, Daejeon 34000, Republic of Korea
- T. Harada
- Nishina Center for Accelerator-Based Science, RIKEN, Hirosawa, Wako, Saitama 351-0198, Japan
- M. Ichikawa
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- K. Inaba
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- Y. Ishii
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- N. Itagaki
- Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- M. Itoh
- Cyclotron and Radioisotope Center, Tohoku University, Aoba, Aramaki, Aoba, Sendai, Miyagi 980-8578, Japan
- C. Iwamoto
- RIKEN Center for Advanced Photonics, RIKEN, Hirosawa, Wako, Saitama 351-0198, Japan
- N. Kobayashi
- Research Center for Nuclear Physics, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- A. Koshikawa
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- S. Kubono
- Nishina Center for Accelerator-Based Science, RIKEN, Hirosawa, Wako, Saitama 351-0198, Japan; Center for Nuclear Study, Graduate School of Science, The University of Tokyo, Hirosawa, Wako, Saitama 351-0198, Japan
- Y. Maeda
- Faculty of Engineering, University of Miyazaki, Gakuen-kibanadai-nishi, Miyazaki 889-2192, Japan
- Y. Matsuda
- Cyclotron and Radioisotope Center, Tohoku University, Aoba, Aramaki, Aoba, Sendai, Miyagi 980-8578, Japan
- S. Matsumoto
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- K. Miki
- Department of Physics, Tohoku University, Aoba, Aramaki, Aoba, Sendai, Miyagi 980-8578, Japan
- T. Morimoto
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- M. Murata
- Research Center for Nuclear Physics, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- T. Nanamura
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- I. Ou
- Department of Physics, Okayama University, Tsushimanaka, Kita, Okayama 700-8530, Japan
- S. Sakaguchi
- Department of Physics, Kyushu University, Motooka, Nishi, Fukuoka 819-0395, Japan
- A. Sakaue
- Nishina Center for Accelerator-Based Science, RIKEN, Hirosawa, Wako, Saitama 351-0198, Japan
- M. Sferrazza
- Départment de Physique, Université Libre de Bruxelles, Bruxelles 1050, Belgium
- K.N. Suzuki
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- T. Takeda
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- A. Tamii
- Research Center for Nuclear Physics, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- K. Watanabe
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- Y.N. Watanabe
- Department of Physics, The University of Tokyo, Hongo, Bunkyo, Tokyo 113-0033, Japan
- H.P. Yoshida
- Research Center for Nuclear Physics, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- J. Zenihiro
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- Journal volume & issue
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Vol. 817
p. 136283
Abstract
The triple alpha reaction is one of the most important reactions in the nuclear astrophysics. However, its reaction rate in high temperature environments at T9> 2 was still uncertain. One of the major origins of the uncertainty was that the radiative-decay probability of the 31− state in 12C was unknown. In the present work, we have determined the radiative-decay probability of the 31− state to be 1.3−1.1+1.2×10−6 by measuring the 1H(12C,12Cp) reaction for the first time, and derived the triple alpha reaction rate in high temperature environments from the measured radiative-decay probability. The present result suggests that the 31− state noticeably enhances the triple alpha reaction rate although the contribution from the 31− state had been assumed to be small.
