Examination of the role of the O-14(alpha, p)F-17 reaction rate in type-I x-ray bursts

doi:10.1103/PhysRevC.90.025803

	Examination of the role of the O-14(alpha, p)F-17 reaction rate in type-I x-ray bursts
	Kubono, S.7,9,10; Hu, J.8,9,10 ; He, J. J.9,10; Parikh, A.3,11; Xu, S. W.9,10,12; Yamaguchi, H.8; Kahl, D.8; Ma, P.9,10 ; Su, J.2; Wang, H. W.1
刊名	PHYSICAL REVIEW C
	2014-08-12
卷号	90
ISSN号	0556-2813
DOI	10.1103/PhysRevC.90.025803
文献子类	Article
英文摘要	The O-14(alpha, p)F-17 reaction is one of the key reactions involved in the breakout from the hot-CNO cycle to the rp-process in type-I x-ray bursts (XRBs). The resonant properties in the compound nucleus Ne-18 have been investigated through resonant elastic scattering of F-17 + p. The radioactive F-17 beam was separated by the Center for Nuclear Study radioactive ion beam separator (CRIB) and bombarded a thick H-2 gas target at 3.6 MeV/nucleon. The recoiling light particles were measured by three Delta E-E silicon telescopes at laboratory angles of theta(lab) approximate to 3 degrees, 10 degrees, and 18 degrees. Five resonances at E-x = 6.15, 6.28, 6.35, 6.85, and 7.05 MeV were observed in the excitation functions, and their spin-parities have been determined based on an R-matrix analysis. In particular, J(pi) = 1(-) was firmly assigned to the 6.15-MeV state which dominates the thermonuclear O-14(alpha, p)F-17 rate below 2 GK. As well, a possible new excited state in Ne-18 was observed at E-x = 6.85 +/- 0.11 MeV with tentative J = 0 assignment. This state could be the analog state of the 6.880 MeV (0(-)) level in the mirror nucleus O-18, or a bandhead state (0(+)) of the six-particle four-hole (6p-4h) band. A new thermonuclear O-14(alpha, p)F-17 rate has been determined, and the astrophysical impact of multiple recent rates has been examined using an XRB model. Contrary to previous expectations, we find only a modest impact on predicted nuclear energy generation rates from using reaction rates differing by up to several orders of magnitude.
资助项目	Priority Centers Research Program in Korea[2009-0093817]
WOS关键词	ASTROPHYSICAL REACTION-RATES ; ACCRETING NEUTRON-STARS ; SHORT-LIVED NUCLEI ; HOT CNO CYCLE ; RESONANCE SCATTERING ; ELASTIC-SCATTERING ; STELLAR REACTIONS ; SEPARATOR CRIB ; RP-PROCESS ; NUCLEOSYNTHESIS
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000341240300005
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/49699]
专题	近代物理研究所_实验物理中心
通讯作者	Hu, J.
作者单位	1.Chinese Acad Sci, Shanghai Inst Appl Phys SINAP, Shanghai 201800, Peoples R China 2.China Inst Atom Energy, Beijing 102413, Peoples R China 3.Univ Politecn Cataluna, EUETIB, Dept Fis & Engn Nucl, E-08036 Barcelona, Spain 4.Chung Ang Univ, Dept Phys, Seoul 156756, South Korea 5.Ewha Womans Univ, Dept Sci Educ, Seoul 120750, South Korea 6.Kyushu Univ, Dept Phys, Fukuoka 8128581, Japan 7.RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan 8.Univ Tokyo, Ctr Nucl Study, RIKEN, Wako Branch, Wako, Saitama 3510198, Japan 9.Chinese Acad Sci, Inst Modern Phys, Ctr Nucl Matter Sci, Lanzhou 730000, Peoples R China 10.Chinese Acad Sci, Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Kubono, S.,Hu, J.,He, J. J.,et al. Examination of the role of the O-14(alpha, p)F-17 reaction rate in type-I x-ray bursts[J]. PHYSICAL REVIEW C,2014,90.
APA	Kubono, S..,Hu, J..,He, J. J..,Parikh, A..,Xu, S. W..,...&Lee, C. S..(2014).Examination of the role of the O-14(alpha, p)F-17 reaction rate in type-I x-ray bursts.PHYSICAL REVIEW C,90.
MLA	Kubono, S.,et al."Examination of the role of the O-14(alpha, p)F-17 reaction rate in type-I x-ray bursts".PHYSICAL REVIEW C 90(2014).