Modified astrophysical S-factor of C-12+C-12 fusion reaction at sub-barrier energies

doi:10.1088/1674-1137/abae56

	Modified astrophysical S-factor of C-12+C-12 fusion reaction at sub-barrier energies
	Li, Y. J.5; Fang, X.1,5; Bucher, B.2; Li, K. A.3,4; Ru, L. H.3,4; Tang, X. D.3,4
刊名	CHINESE PHYSICS C
	2020-11-01
卷号	44 期号:11 页码:19
关键词	carbon burning C-12+C-12 fusion statistical model quasi-molecular resonance astrophysical S-factor reaction rate stellar evolution
ISSN号	1674-1137
DOI	10.1088/1674-1137/abae56
通讯作者	Fang, X.(fangx26@mail.sysu.edu.cn)
英文摘要	The C-12+C-12 fusion reaction plays a crucial role in stellar evolution and explosions. Its main open reaction channels include alpha, p, n, and Be-8. Despite more than a half century of efforts, large differences remain among the experimental data of this reaction measured using various techniques. In this work, we analyze the existing data using a statistical model. Our calculation shows the following: 1) the relative systematic uncertainties of the predicted branching ratios decrease as the predicted ratios increase; 2) the total modified astrophysical S-factors (S* factors) of the p and channels can be obtained by summing the S* factors of their corresponding ground-state transitions and the characteristic gamma rays, while taking into account the contributions of the missing channels to the latter. After applying corrections based on branching ratios predicted by the statistical model, an agreement is achieved among the different data sets at E-cm > 4 MeV, while some discrepancies remain at lower energies, suggesting the need for better measurements in the near future. We find that the S* factor recently obtained from an indirect measurement is inconsistent with the direct measurement value at energies below 2.6 MeV. We recommend upper and lower limits for the C-12+C-12 S* factor based on the existing models. A new C-12+C-12 reaction rate is also recommended.
资助项目	National Key Research and Development Program of China[2016YFA0400501] ; National Natural Science Foundation of China[11805291] ; National Natural Science Foundation of China[11575292] ; National Natural Science Foundation of China[11475228] ; National Natural Science Foundation of China[11490564] ; National Natural Science Foundation of China[11875329] ; U.S. Department of Energy[DE-AC07-05ID14517] ; Fundamental Research Funds for the Central Universities[18lgpy84] ; Continuous Basic Scientific Research Project[WDJC-2019-13] ; CNNC RD program[FA18000201] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB34000000] ; Hundred Talents Program of the Chinese Academy of Sciences
WOS关键词	CROSS-SECTIONS ; C-12&C-12
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000582821200001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; U.S. Department of Energy ; Fundamental Research Funds for the Central Universities ; Continuous Basic Scientific Research Project ; CNNC RD program ; Strategic Priority Research Program of Chinese Academy of Sciences ; Hundred Talents Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/139512]
专题	中国科学院近代物理研究所
通讯作者	Fang, X.
作者单位	1.Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China 2.Idaho Natl Lab, Idaho Falls, ID 83415 USA 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 4.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China 5.China Inst Atom Energy, Beijing 102413, Peoples R China
推荐引用方式 GB/T 7714	Li, Y. J.,Fang, X.,Bucher, B.,et al. Modified astrophysical S-factor of C-12+C-12 fusion reaction at sub-barrier energies[J]. CHINESE PHYSICS C,2020,44(11):19.
APA	Li, Y. J.,Fang, X.,Bucher, B.,Li, K. A.,Ru, L. H.,&Tang, X. D..(2020).Modified astrophysical S-factor of C-12+C-12 fusion reaction at sub-barrier energies.CHINESE PHYSICS C,44(11),19.
MLA	Li, Y. J.,et al."Modified astrophysical S-factor of C-12+C-12 fusion reaction at sub-barrier energies".CHINESE PHYSICS C 44.11(2020):19.