1. Astrophysics Studies Relevant to Stellar X-Ray Bursts.
- Author
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He, J. J., Hu, J., Zhang, L. Y., Xu, S. W., Parikh, A., Yamaguchi, H., Kahl, D., Ma, P., Chen, S. Z., Su, J., Wakabayashi, Y., Togano, Y., Hayakawa, S., Wang, H. W., Tian, W. D., Chen, R. F., Guo, B., Nakao, T., Teranishi, T., and Moon, J. Y.
- Subjects
NUCLEAR astrophysics ,X-ray bursts ,PROTON emission decay ,ION beams ,COMPOUND nucleus ,R-matrices ,NEUTRON stars ,NUCLEOSYNTHESIS - Abstract
Two reactions of
14 O(α,p)17 F and18 Ne(α,p)21Na provide the pathways for breakout from the hot CNO cycles to the rp-process in type I X-ray bursts. To better determine their astrophysical reaction rates, resonance parameters of the compound nuclei18 Ne and22 Mg have been investigated by the resonant elastic scattering of17 F+p and21 Na+p, respectively. The 17F and 21Na radioactive ion beams were produced at the CNS Radioactive Ion Beam Separator and impinged on the thick proton targets. The excitation functions were obtained with a thick-target method over a wide excitation energy range. The resonance parameters in the compound nuclei18 Ne and22 Mg have been determined through an R-matrix analysis. New reaction rates of these two (α,p) reactions are recalculated. The astrophysical impact for the18 Ne(α,p)21 Na reaction has been investigated through one-zone postprocessing X-ray burst calculations. [ABSTRACT FROM AUTHOR]- Published
- 2014
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