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arXiv 1002.2788astro-ph.SR
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~(12)C +~(12)C速率不确定性对s过程产额的影响

The effect of 12C + 12C rate uncertainties on s-process yields

M E Bennett, R Hirschi, M Pignatari, S Diehl, C Fryer, F Herwig, A Hungerford, G Magkotsios, G Rockefeller, F Timmes, M Wiescher, P Young

摘要:

大质量恒星中的慢中子俘获过程(弱s过程)产生了大多数质量区域为60 < A < 90的纯s同位素。在这个过程的模拟中使用的核反应速率对最终的s-过程产量有深远的影响。我们生成了一个25太阳质量的恒星的1D恒星模型,12 C +12 C率变化了10倍,并使用后处理代码PPN计算了完整的核合成。将速率增加或减少10倍会影响对流历史和核合成,从而影响最终产额。

英文摘要:

The slow neutron capture process in massive stars (the weak s-process) produces most of the s-only isotopes in the mass region 60 < A < 90. The nuclear reaction rates used in simulations of this process have a profound effect on the final s-process yields. We generated 1D stellar models of a 25 solar mass star varying the 12C + 12C rate by a factor of 10 and calculated full nucleosynthesis using the post-processing code PPN. Increasing or decreasing the rate by a factor of 10 affects the convective history and nucleosynthesis, and consequently the final yields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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