Статья

New Determination of the <sup>12</sup>C(α, γ)<sup>16</sup>O Reaction Rate and Its Impact on the Black-hole Mass Gap

Y. P. ShenChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Bing GuoChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]R. J. deBoerDepartment of Physics and Astronomy and the Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, Indiana 46556, USA [email protected]E. T. LiInstitute 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 LiChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Yunju LiChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Xiaodong TangInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of ChinaDanyang PangBeijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, People’s Republic of ChinaSucheta AdhikariPhysics Department, Techno India University, Kolkata 700091, IndiaChinmay BasuNuclear Physics Division, Saha Institute of Nuclear Physics, Kolkata-700064, IndiaJun SuCollege of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, People’s Republic of ChinaS. Q. YanChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Qiwen FanChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Jiancheng LiuChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Chen ChenChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Zhiyu HanChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]X. Y. LiChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Gang LianChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Tianli MaChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Wei NanChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Weike NanChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Youbao WangChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Sheng ZengChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Hao ZhangChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]Weiping LiuChina Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, People’s Republic of China; [email protected], [email protected]

2023en

ABI

Аннотация

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.

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Идентификаторы

DOI: 10.3847/1538-4357/acb7de

Цитирования и источники

Цитирований: 2Использованных источников: 0

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