skip to main content

SciTech ConnectSciTech Connect

Title: Astrophysics studies relevant to stellar x-ray bursts

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.
Authors:
; ; ; ; ; ;  [1] ;  [2] ; ; ;  [3] ; ;  [4] ; ;  [5] ;  [6] ; ;  [7] ;  [8] ;  [9] more »; « less
  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)
Publication Date:
OSTI Identifier:
22280455
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1594; Journal Issue: 1; Conference: OMEG12: 12. international symposium on origin of matter and evolution of galaxies, Tsukuba (Japan), 18-21 Nov 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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