Investigation of the thermonuclear Ne-18(alpha,p)Na-21 reaction rate via resonant elastic scattering of Na-21 + p

doi:10.1103/PhysRevC.89.015804

	Investigation of the thermonuclear Ne-18(alpha,p)Na-21 reaction rate via resonant elastic scattering of Na-21 + p
	Teranishi, T.9; Zhou, X. H.; Zhang, Y. H.13; Komatsubara, T.7,13; Yamada, T.8; Iwasa, N.8; Hayakawa, S.3; Togano, Y.1; Hashimoto, T.3; Guo, B.10
刊名	PHYSICAL REVIEW C
	2014-01-23
卷号	89
ISSN号	0556-2813
DOI	10.1103/PhysRevC.89.015804
文献子类	Article
英文摘要	The Ne-18(alpha,p)Na-21 reaction is thought to be one of the key breakout reactions from the hot CNO cycles to the rp process in type I x-ray bursts. In this work, the resonant properties of the compound nucleus Mg-22 have been investigated by measuring the resonant elastic scattering of Na-21 + p. An 89-MeV Na-21 radioactive beam delivered from the CNS Radioactive Ion Beam Separator bombarded an 8.8 mg/cm(2) thick polyethylene (CH2)(n) target. The Na-21 beam intensity was about 2 x 10(5) pps, with a purity of about 70% on target. The recoiled protons were measured at the center-of-mass scattering angles of theta(c.m) approximate to 175.2 degrees, 152.2 degrees, and 150.5 degrees. by three sets of Delta E-E telescopes, respectively. The excitation function was obtained with the thick-target method over energies E-x (Mg-22) = 5.5-9.2 MeV. In total, 23 states above the proton-threshold in Mg-22 were observed, and their resonant parameters were determined via an R-matrix analysis of the excitation functions. We have made several new J(pi) assignments and confirmed some tentative assignments made in previous work. The thermonuclear Ne-18(alpha, p)Na-21 rate has been recalculated based on our recommended spin-parity assignments. The astrophysical impact of our new rate has been investigated through one-zone postprocessing x-ray burst calculations. We find that the Ne-18(alpha, p)Na-21 rate significantly affects the peak nuclear energy generation rate, reaction fluxes, and onset temperature of this breakout reaction in these astrophysical phenomena.
资助项目	Spanish MICINN[AYA2010-15685] ; Spanish MICINN[EUI2009-04167]
WOS关键词	ASTROPHYSICAL REACTION-RATES ; X-RAY-BURSTS ; SEPARATOR CRIB ; RP-PROCESS ; NUCLEOSYNTHESIS ; STATES ; BEAM ; TARGET
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000332157000004
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/49861]
专题	近代物理研究所_实验物理中心
通讯作者	Zhang, L. Y.
作者单位	1.RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Tokyo, RIKEN, Ctr Nucl Study, Wako, Saitama 3510198, Japan 4.Japan Atom Energy Agcy, Adv Sci Res Ctr, Ibaraki 3191106, Japan 5.Diakonie Klinikum, D-74523 Stuttgart, Germany 6.Inst Nucl Res ATOMKI, H-4001 Debrecen, Hungary 7.Univ Tsukuba, Dept Phys, Ibaraki 3058571, Japan 8.Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan 9.Kyushu Univ, Dept Phys, Fukuoka 8128581, Japan 10.China Inst Atom Energy, Beijing 102413, Peoples R China
推荐引用方式 GB/T 7714	Teranishi, T.,Zhou, X. H.,Zhang, Y. H.,et al. Investigation of the thermonuclear Ne-18(alpha,p)Na-21 reaction rate via resonant elastic scattering of Na-21 + p[J]. PHYSICAL REVIEW C,2014,89.
APA	Teranishi, T..,Zhou, X. H..,Zhang, Y. H..,Komatsubara, T..,Yamada, T..,...&Zhang, L. Y..(2014).Investigation of the thermonuclear Ne-18(alpha,p)Na-21 reaction rate via resonant elastic scattering of Na-21 + p.PHYSICAL REVIEW C,89.
MLA	Teranishi, T.,et al."Investigation of the thermonuclear Ne-18(alpha,p)Na-21 reaction rate via resonant elastic scattering of Na-21 + p".PHYSICAL REVIEW C 89(2014).