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

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Investigation of the thermonuclear Ne-18(alpha,p)Na-21 reaction rate via resonant elastic scattering of Na-21 + p
	Zhang, LY ; He, JJ ; Parikh, A ; Xu, SW ; Yamaguchi, H ; Kahl, D ; Kubono, S ; Mohr, P ; Hu, J ; Ma, P ; Chen, SZ ; Wakabayashi, Y ; Wang, HW ; Tian, WD ; Chen, RF ; Guo, B ; Hashimoto, T ; Togano, Y ; Hayakawa, S ; Teranishi, T ; Iwasa, N ; Yamada, T ; Komatsubara, T ; Zhang, YH ; Zhou, XH
刊名	PHYSICAL REVIEW C
	2014
卷号	89 期号:1
关键词	ASTROPHYSICAL REACTION-RATES X-RAY-BURSTS SEPARATOR CRIB RP-PROCESS NUCLEOSYNTHESIS STATES BEAM TARGET
ISSN号	0556-2813
通讯作者	jianjunhe@impcas.ac.cn
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.
收录类别	SCI
语种	英语
WOS记录号	WOS:000332157000004
公开日期	2015-03-13
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/14205]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Zhang, LY,He, JJ,Parikh, A,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(1).
APA	Zhang, LY.,He, JJ.,Parikh, A.,Xu, SW.,Yamaguchi, H.,...&Zhou, XH.(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(1).
MLA	Zhang, LY,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 89.1(2014).