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arXiv 1701.06978astro-ph.SRnucl-exnucl-th
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恒星温度核物理不确定性对s-过程核合成的影响

Impacts of nuclear-physics uncertainty in stellar temperatures on the s-process nucleosynthesis

N. Nishimura, G. Cescutti, R. Hirschi, T. Rauscher, J. Den Hartogh, A. St. J. Murphy

摘要:

我们评估的不确定性相关的s-过程核合成使用Monte-Carlo为中心的方法。我们是基于一个现实的和一般的处方温度依赖的不确定性的反应。我们认为大质量恒星的弱s-过程和AGB星的主要s-过程。我们发现,采用的不确定性(n,$γ$)率,百分之几十的平均水平,影响生产的s-过程核沿$β$ -稳定线,而对于$β$ -衰变,其中贡献从激发态增强的不确定性,具有最强的影响分支点。

英文摘要:

We evaluated the uncertainty relevant to s-process nucleosynthesis using a Monte-Carlo centred approach. We are based on a realistic and general prescription of temperature dependent uncertainty for the reactions. We considered massive stars for the weak s-process and AGB stars for the main s-process. We found that the adopted uncertainty for (n,$γ$) rates, tens of per cent on average, affect the production of s-process nuclei along the $β$-stability line, while for $β$-decay, for which contributions from excited states enhances the uncertainty, has the strongest impact on branching points.

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