Astrophysics studies relevant to stellar x-ray bursts

Journal Article · Fri May 02 04:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4874064· OSTI ID:22280455

He, J. J.; Hu, J.; Zhang, L. Y.; Xu, S. W.; Ma, P.; Chen, S. Z.; Chen, R. F. ^[1]; Parikh, A. ^[2]; Yamaguchi, H.; Kahl, D.; Nakao, T. ^[3]; Su, J.; Guo, B. ^[4]; Wakabayashi, Y.; Togano, Y. ^[5]; Hayakawa, S. ^[6]; Wang, H. W.; Tian, W. D. ^[7]; Teranishi, T. ^[8]; Moon, J. Y. ^[9] ; others, and

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1. Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000 (China)
2. EUETIB, Universitat Politècnica de Catalunya, Barcelona E-08036, Spain and Institut d'Estudis Espacials de Catalunya, Barcelona E-08034 (Spain)
3. CNS, the University of Tokyo, Wako Branch at RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
4. China Institute of Atomic Energy (CIAE), P.O. Box 275(46), Beijing 102413 (China)
5. RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
6. CNS, the University of Tokyo, Wako Branch at RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Spain)
7. Shanghai Institute of Applied Physics (SINAP), Chinese Academy of Sciences (CAS), Shanghai 201800 (China)
8. Department of Physics, Kyushu University, 6-10-1 Hakozaki, Fukuoka 812-8581 (Japan)
9. Department of Physics, Chung-Ang University, Seoul 156-756 (Korea, Republic of)

Two reactions of {sup 14}O(α,p){sup 17}F and {sup 18}Ne(α,p){sup 21}Na 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 nuclei {sup 18}Ne and {sup 22}Mg have been investigated by the resonant elastic scattering of {sup 17}F+p and {sup 21}Na+p, respectively. The {sup 17}F and {sup 21}Na 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 nuclei {sup 18}Ne and {sup 22}Mg have been determined through an R-matrix analysis. New reaction rates of these two (α,p) reactions are recalculated. The astrophysical impact for the {sup 18}Ne(α,p){sup 21}Na reaction has been investigated through one-zone postprocessing X-ray burst calculations.

• OSTI ID: 22280455
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1594; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ASTROPHYSICS
CNO CYCLE
COSMIC X-RAY BURSTS
ELASTIC SCATTERING
EXCITATION FUNCTIONS
FLUORINE 17
MAGNESIUM 22
NEON 18
NUCLEAR REACTION KINETICS
OXYGEN 14 TARGET
R MATRIX
RADIOACTIVE ION BEAMS
RESONANCE
SODIUM 21