The Astrophysical Journal (Jan 2023)
New Determination of the 12C(α, γ)16O Reaction Rate and Its Impact on the Black-hole Mass Gap
- Yangping Shen,
- Bing Guo,
- Richard J. deBoer,
- Ertao Li,
- Zhihong Li,
- Yunju Li,
- Xiaodong Tang,
- Danyang Pang,
- Sucheta Adhikari,
- Chinmay Basu,
- Jun Su,
- Shengquan Yan,
- Qiwen Fan,
- Jiancheng Liu,
- Chen Chen,
- Zhiyu Han,
- Xinyue Li,
- Gang Lian,
- Tianli Ma,
- Wei Nan,
- Weike Nan,
- Youbao Wang,
- Sheng Zeng,
- Hao Zhang,
- Weiping Liu
Affiliations
- Yangping Shen
- ORCiD
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Bing Guo
- ORCiD
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Richard J. deBoer
- ORCiD
- Department of Physics and Astronomy and the Joint Institute for Nuclear Astrophysics, University of Notre Dame , Notre Dame, Indiana 46556, USA [email protected]
- Ertao Li
- ORCiD
- Institute for Advanced Study in Nuclear Energy & Safety, College of Physics and Optoelectronic Engineering, Shenzhen University , Shenzhen 518060, People’s Republic of China ; [email protected]
- Zhihong Li
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Yunju Li
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Xiaodong Tang
- Institute of Modern Physics, Chinese Academy of Sciences , Lanzhou 730000, People’s Republic of China
- Danyang Pang
- School of Physics, Beihang University , Beijing 100191, People’s Republic of China; Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University , Beijing 100191, People’s Republic of China
- Sucheta Adhikari
- Physics Department, Techno India University , Kolkata 700091, India
- Chinmay Basu
- Nuclear Physics Division, Saha Institute of Nuclear Physics , Kolkata-700064, India
- Jun Su
- College of Nuclear Science and Technology, Beijing Normal University , Beijing 100875, People’s Republic of China
- Shengquan Yan
- ORCiD
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Qiwen Fan
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Jiancheng Liu
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Chen Chen
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Zhiyu Han
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Xinyue Li
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Gang Lian
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Tianli Ma
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Wei Nan
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Weike Nan
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Youbao Wang
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Sheng Zeng
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Hao Zhang
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- Weiping Liu
- China Institute of Atomic Energy , P.O. Box 275(10), Beijing 102413, People’s Republic of China ; [email protected], [email protected]
- DOI
- https://doi.org/10.3847/1538-4357/acb7de
- Journal volume & issue
-
Vol. 945,
no. 1
p. 41
Abstract
We present a precise measurement of the asymptotic normalization coefficient (ANC) for the ^16 O ground state (GS) through the ^12 C( ^11 B, ^7 Li) ^16 O transfer reaction using the Quadrupole‐3‐Dipole (Q3D) magnetic spectrograph. The present work sheds light on the existing discrepancy of more than 2 orders of magnitude between the previously reported GS ANC values. This ANC is believed to have a strong effect on the ^12 C( α , γ ) ^16 O reaction rate by constraining the external capture to the ^16 O ground state, which can interfere with the high-energy tail of the 2 ^+ subthreshold state. Based on the new ANC, we determine the astrophysical S -factor and the stellar rate of the ^12 C( α , γ ) ^16 O reaction. An increase of up to 21% in the total reaction rate is found within the temperature range of astrophysical relevance compared with the previous recommendation of a recent review. Finally, we evaluate the impact of our new rate on the pair-instability mass gap for black holes (BH) by evolving massive helium core stars using the MESA stellar evolution code. The updated ^12 C( α , γ ) ^16 O reaction rate decreases the lower and upper edges of the BH gap about 12% and 5%, respectively.
Keywords
