First Direct Measurement of C-12(C-12,n)Mg-23 at Stellar Energies

doi:10.1103/PhysRevLett.114.251102

	First Direct Measurement of C-12(C-12,n)Mg-23 at Stellar Energies
	Bucher, B.1,2; Tang, X. D.3; Fang, X.1; Heger, A.4,5,6; Almaraz-Calderon, S.1; Alongi, A.1; Ayangeakaa, A. D.1; Beard, M.1; Best, A.1; Browne, J.1
刊名	PHYSICAL REVIEW LETTERS
	2015-06-25
卷号	114 页码:6
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.114.251102
英文摘要	Neutrons produced by the carbon fusion reaction C-12(C-12, n)Mg-23 play an important role in stellar nucleosynthesis. However, past studies have shown large discrepancies between experimental data and theory, leading to an uncertain cross section extrapolation at astrophysical energies. We present the first direct measurement that extends deep into the astrophysical energy range along with a new and improved extrapolation technique based on experimental data from the mirror reaction C-12(C-12, p)Na-23. The new reaction rate has been determined with a well-defined uncertainty that exceeds the precision required by astrophysics models. Using our constrained rate, we find that C-12(C-12, n)Mg-23 is crucial to the production of Na and Al in pop-III pair instability supernovae. It also plays a nonnegligible role in the production of weak s-process elements, as well as in the production of the important galactic gamma-ray emitter Fe-60.
资助项目	NSF[PHY-0758100] ; NSF[PHY-0822648] ; National Natural Science Foundation of China[11021504] ; National Natural Science Foundation of China[11321064] ; National Natural Science Foundation of China[11475228] ; National Natural Science Foundation of China[11490564] ; 100 Talents Program of Chinese Academy of Sciences ; Joint Institute for Nuclear Astrophysics ; University of Notre Dame ; Lawrence Livermore National Laboratory[DE-AC52-07NA27344] ; Lendulet Programme of the Hungarian Academy of Sciences (Hungary) ; SNF (Switzerland) ; NuGrid Collaboration ; Australian Research Council[FT120100363] ; NASA[NNX14AH34G] ; UC Office of the President[12-LF-237070] ; U. S. Department of Energy
WOS关键词	MASSIVE STARS ; S-PROCESS ; SUBCOULOMB ENERGIES ; NUCLEOSYNTHESIS ; C-12 ; SIGNATURE ; EVOLUTION ; NUCLEAR ; IMPACT ; YIELDS
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000356901300001
资助机构	NSF ; National Natural Science Foundation of China ; 100 Talents Program of Chinese Academy of Sciences ; Joint Institute for Nuclear Astrophysics ; University of Notre Dame ; Lawrence Livermore National Laboratory ; Lendulet Programme of the Hungarian Academy of Sciences (Hungary) ; SNF (Switzerland) ; NuGrid Collaboration ; Australian Research Council ; NASA ; UC Office of the President ; U. S. Department of Energy
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/40045]
专题	中国科学院近代物理研究所
通讯作者	Bucher, B.
作者单位	1.Univ Notre Dame, Joint Inst Nucl Astrophys, Inst Struct & Nucl Astrophys, Notre Dame, IN 46556 USA 2.Lawrence Livermore Natl Lab, Livermore, CA 94550 USA 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 4.Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys, Clayton, Vic 3800, Australia 5.Shanghai Jiao Tong Univ, CNA, Dept Phys & Astron, Shanghai 200240, Peoples R China 6.Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA 7.China Inst Atom Energy, Beijing 102413, Peoples R China 8.Hungarian Acad Sci, Res Ctr Astron & Earth Sci, Konkoly Observ, H-1121 Budapest, Hungary 9.Univ Basel, Dept Phys, CH-4056 Basel, Switzerland 10.Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA
推荐引用方式 GB/T 7714	Bucher, B.,Tang, X. D.,Fang, X.,et al. First Direct Measurement of C-12(C-12,n)Mg-23 at Stellar Energies[J]. PHYSICAL REVIEW LETTERS,2015,114:6.
APA	Bucher, B..,Tang, X. D..,Fang, X..,Heger, A..,Almaraz-Calderon, S..,...&Woosley, S. E..(2015).First Direct Measurement of C-12(C-12,n)Mg-23 at Stellar Energies.PHYSICAL REVIEW LETTERS,114,6.
MLA	Bucher, B.,et al."First Direct Measurement of C-12(C-12,n)Mg-23 at Stellar Energies".PHYSICAL REVIEW LETTERS 114(2015):6.