Constraining the External Capture to the O-16 Ground State and the E2 S Factor of the C-12(alpha,gamma)O-16 Reaction

doi:10.1103/PhysRevLett.124.162701

	Constraining the External Capture to the O-16 Ground State and the E2 S Factor of the C-12(alpha,gamma)O-16 Reaction
	Shen, Y. P.6; Guo, B.6; deBoer, R. J.7; Li, Z. H.6; Li, Y. J.6; Tang, X. D.8; Pang, D. Y.2,3; Adhikari, S.4; Basu, C.1; Su, J.5
刊名	PHYSICAL REVIEW LETTERS
	2020-04-21
卷号	124 期号:16 页码:6
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.124.162701
通讯作者	Guo, B.(guobing@ciae.ac.cn) ; deBoer, R. J.(rdeboer1@nd.edu)
英文摘要	The C-12(alpha,gamma)O-16 reaction is one of the most crucial reactions in nuclear astrophysics. The E2 external capture to the O-16 ground state (GS) has not been emphasized in previous analyses but may make a significant contribution to the C-12(alpha,gamma)O-16 cross section depending on the value of the GS asymptotic normalization coefficient (ANC). In the present work, we determine this ANC to be 337 +/- 45 fm(-1/2) through the C-12(B-11, Li-7)O-16 reaction using a high-precision magnetic spectrograph. This sheds light on the existing large discrepancy of more than 2 orders of magnitude between the previously reported ANC values. Based on the new ANC, we experimentally constrain the GS external capture and show that through interference with the high energy tail of the 2(+) subthreshold state, a substantial enhancement in the GS S-E2(300) factor can be obtained (70 +/- 7 keV b) compared to that of a recent review (45 keV b), resulting in an increase of the total S factor from 140 to 162 keV b, which is now in good agreement with the value obtained by reproducing supernova nucleosynthesis calculations with the solar-system abundances. This work emphasizes that the external capture contribution for the ground state transition cannot be neglected in future analyses of the C-12(alpha,gamma)O-16 reaction.
资助项目	National Key Research and Development Project[2016YFA0400502] ; National Natural Science Foundation of China[11490561] ; National Natural Science Foundation of China[11475264] ; National Natural Science Foundation of China[11775013] ; National Natural Science Foundation of China[U1867214] ; Continuous Basic Scientific Research Project[WDJC-2019-13] ; National Science Foundation[Phys-0758100] ; Joint Institute for Nuclear Astrophysics[Phys-0822648]
WOS关键词	CROSS-SECTIONS ; C-12(ALPHA ; STARS
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000527135200005
资助机构	National Key Research and Development Project ; National Natural Science Foundation of China ; Continuous Basic Scientific Research Project ; National Science Foundation ; Joint Institute for Nuclear Astrophysics
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/140492]
专题	中国科学院近代物理研究所
通讯作者	Guo, B.; deBoer, R. J.
作者单位	1.Saha Inst Nucl Phys, Nucl Phys Div, Kolkata 700064, India 2.Beihang Univ, Beijing Key Lab Adv Nucl Mat & Phys, Beijing 100191, Peoples R China 3.Beihang Univ, Sch Phys, Beijing 100191, Peoples R China 4.Techno India Univ, Phys Dept, Kolkata 700091, India 5.Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China 6.China Inst Atom Energy, POB 275,10, Beijing 102413, Peoples R China 7.Univ Notre Dame, Joint Inst Nucl Astrophys, Dept Phys, Notre Dame, IN 46556 USA 8.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Shen, Y. P.,Guo, B.,deBoer, R. J.,et al. Constraining the External Capture to the O-16 Ground State and the E2 S Factor of the C-12(alpha,gamma)O-16 Reaction[J]. PHYSICAL REVIEW LETTERS,2020,124(16):6.
APA	Shen, Y. P..,Guo, B..,deBoer, R. J..,Li, Z. H..,Li, Y. J..,...&Liu, W. P..(2020).Constraining the External Capture to the O-16 Ground State and the E2 S Factor of the C-12(alpha,gamma)O-16 Reaction.PHYSICAL REVIEW LETTERS,124(16),6.
MLA	Shen, Y. P.,et al."Constraining the External Capture to the O-16 Ground State and the E2 S Factor of the C-12(alpha,gamma)O-16 Reaction".PHYSICAL REVIEW LETTERS 124.16(2020):6.