中国物理B ›› 2007, Vol. 16 ›› Issue (6): 1637-1640.doi: 10.1088/1009-1963/16/6/025

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Re-evaluation of the 23Mg(p,γ)24Al reaction rate

刘宏林, 刘门全, 赖祥军, 罗志全   

  1. Institute of Theoretical Physics, China West Normal University, Nanchong, Sichuan 637002, China
  • 收稿日期:2006-08-18 修回日期:2006-12-18 出版日期:2007-06-20 发布日期:2007-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No~10347008).

Re-evaluation of the 23Mg(p, $\gamma$)24Al reaction rate

Liu Hong-Lin(刘宏林), Liu Men-Quan(刘门全), Lai Xiang-Jun (赖祥军), and Luo Zhi-Quan(罗志全)†   

  1. Institute of Theoretical Physics, China West Normal University, Nanchong, Sichuan 637002, China
  • Received:2006-08-18 Revised:2006-12-18 Online:2007-06-20 Published:2007-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No~10347008).

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摘要： Based on a new screening Coulomb model, this paper discusses the effect of electron screening on proton capture reaction of $^{23}$Mg. The derived result shows that, in some considerable range of stellar temperatures, the effect of electron screening on resonant reaction is prominent; on the non-resonant reaction the effect is obvious only in the low stellar temperatures. The reaction rates of $^{23}$Mg(p,$\gamma )^{24}$Al would increase 15\%--25{\%} due to the fact that the electron screening are considered in typical temperature range of massive mass white dwarfs, and the results undoubtedly affect the nucleosynthesis of some heavier nuclei in massive mass white dwarfs.

关键词: electron screening, thermonuclear reaction, nucleosynthesis, stellar evolution

Abstract: Based on a new screening Coulomb model, this paper discusses the effect of electron screening on proton capture reaction of $^{23}$Mg. The derived result shows that, in some considerable range of stellar temperatures, the effect of electron screening on resonant reaction is prominent; on the non-resonant reaction the effect is obvious only in the low stellar temperatures. The reaction rates of $^{23}$Mg(p, $\gamma )^{24}$Al would increase 15%--25% due to the fact that the electron screening are considered in typical temperature range of massive mass white dwarfs, and the results undoubtedly affect the nucleosynthesis of some heavier nuclei in massive mass white dwarfs.

Key words: electron screening, thermonuclear reaction, nucleosynthesis, stellar evolution

中图分类号:  (Radiative capture)

  • 25.40.Lw
27.30.+t (20 ≤ A ≤ 38) 95.30.Cq (Elementary particle processes) 97.10.Cv (Stellar structure, interiors, evolution, nucleosynthesis, ages) 97.20.Rp (Faint blue stars (including blue stragglers), white dwarfs, degenerate stars, nuclei of planetary nebulae)