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The Ne-18(alpha, p)Na-21 breakout reaction in x-ray bursts: Experimental determination of spin-parities for a resonances in Mg-22 via resonant elastic scattering of Na-21 + p
He, J. J.; Zhang, L. Y.; Parikh, A.; Xu, S. W.; Yamaguchi, H.; Kahl, D.; Kubono, S.; Hu, J.; Ma, P.; Chen, S. Z.; Wakabayashi, Y.; Sun, B. H.; Wang, H. W.; Tian, W. D.; Chen, R. F.; Guo, B.; Hashimoto, T.; Togano, Y.; Hayakawa, S.; Teranishi, T.; Iwasa, N.; Yamada, T.; Komatsubara, T.
2013
Source PublicationPHYSICAL REVIEW C
ISSN0556-2813
Volume88Issue:1
AbstractThe 18Ne(alpha, p)Na-21 reaction provides a pathway for breakout from the hot CNO cycles to the rp process in type-l x-ray bursts. To better determine this astrophysical reaction rate, the resonance parameters 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 ion beam was produced at the CNS Radioactive Ion Beam Separator and bombarded an 8.8 mg/cm(2) thick polyethylene target. The recoiled protons were measured at scattering angles of theta(c.m.) approximate to 175 degrees and 152 degrees by three Delta E-E silicon telescopes. The excitation function was obtained with a thick-target method over energies Ex (Mg-22) = 5.5-9.2 MeV. The resonance parameters have been determined through an R-matrix analysis. For the first time, the J(pi) values for ten states above the a threshold in Mg-22 have been experimentally determined in a single consistent measurement. We have made three new J(pi) assignments and confirmed seven of the ten tentative assignments in the previous work. The Ne-18(alpha, p)Na-21 reaction rate has been recalculated, and 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 and the onset temperature of this breakout reaction in these phenomena.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000322576400003
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13959
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
He, J. J.,Zhang, L. Y.,Parikh, A.,et al. The Ne-18(alpha, p)Na-21 breakout reaction in x-ray bursts: Experimental determination of spin-parities for a resonances in Mg-22 via resonant elastic scattering of Na-21 + p[J]. PHYSICAL REVIEW C,2013,88(1).
APA He, J. J..,Zhang, L. Y..,Parikh, A..,Xu, S. W..,Yamaguchi, H..,...&Komatsubara, T..(2013).The Ne-18(alpha, p)Na-21 breakout reaction in x-ray bursts: Experimental determination of spin-parities for a resonances in Mg-22 via resonant elastic scattering of Na-21 + p.PHYSICAL REVIEW C,88(1).
MLA He, J. J.,et al."The Ne-18(alpha, p)Na-21 breakout reaction in x-ray bursts: Experimental determination of spin-parities for a resonances in Mg-22 via resonant elastic scattering of Na-21 + p".PHYSICAL REVIEW C 88.1(2013).
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