arXiv 1708.016292017-08-02astro-ph.SRnucl-exnucl-th

s-过程核合成：由蒙特卡罗变分确定的核物理中不确定性的影响

The s-process nucleosynthesis: impact of the uncertainties in the nuclear physics determined by Monte Carlo variations

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

备注：: Proceedings of the conference "The AGB-Supernovae Mass Transition", held at Rome Observatory, March 27-31, 2017; in press for the Mem. Societa Astronomica Italiana (4 pages, 2 figures, and 1 table). arXiv admin note: text overlap with arXiv:1701.06978
发表信息：: Mem. S. A.It. 88, 432 (2017)

摘要：

我们研究了中子俘获和弱反应（重元素）的不确定性对低质量恒星和大质量恒星的s-过程核合成的影响，使用基于蒙特卡罗的方法。我们进行了广泛的核反应网络计算，包括新评估的温度依赖的上限和下限的个人反应速率。我们发现β衰变率的不确定性只影响少数核附近的S-过程分支，而在最终丰度的不确定性是由中子俘获率的不确定性。我们提出了一个不确定的利率作为候选人，以改善测量未来的实验。

英文摘要：

We investigated the impact of uncertainties in neutron-capture and weak reactions (on heavy elements) on the s-process nucleosynthesis in low-mass stars and massive stars using a Monte-Carlo based approach. We performed extensive nuclear reaction network calculations that include newly evaluated temperature-dependent upper and lower limits for the individual reaction rates. We found beta-decay rate uncertainties affect only a few nuclei near s-process branchings, whereas most of the uncertainty in the final abundances is caused by uncertainties in the neutron capture rates. We suggest a list of uncertain rates as candidates for improved measurement by future experiments.

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摘要：

英文摘要：

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