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

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...

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Bibliographic Details
Published in:Physics letters. B Vol. 817; p. 136283
Main Authors: Tsumura, M., Kawabata, T., Takahashi, Y., Adachi, S., Akimune, H., Ashikaga, S., Baba, T., Fujikawa, Y., Fujimura, H., Fujioka, H., Furuno, T., Hashimoto, T., Harada, T., Ichikawa, M., Inaba, K., Ishii, Y., Itagaki, N., Itoh, M., Iwamoto, C., Kobayashi, N., Koshikawa, A., Kubono, S., Maeda, Y., Matsuda, Y., Matsumoto, S., Miki, K., Morimoto, T., Murata, M., Nanamura, T., Ou, I., Sakaguchi, S., Sakaue, A., Sferrazza, M., Suzuki, K.N., Takeda, T., Tamii, A., Watanabe, K., Watanabe, Y.N., Yoshida, H.P., Zenihiro, J.
Format: Journal Article
Language:English
Published: Elsevier B.V 10.06.2021
Elsevier
Subjects:
Nucleosynthesis
Radiative-decay probability
Triple alpha reaction
Triple alpha reaction
Nucleosynthesis
Radiative-decay probability
ISSN:0370-2693, 1873-2445
Online Access:Get full text
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Summary: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.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2021.136283