Cosmic Implications of $ ^{12}\mathrm C(n,\gamma)^{13}\mathrm C$ Reaction: A Nuclear Astrophysical Perspective

Soumya Saha
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Abstract

We have studied a comprehensive work on the neutron capture cross section for $^{12}\mathrm C$ within the relevant astrophysical energy range. Through rigorous R-matrix analysis, we have determined the Maxwellian-averaged cross section to be 11.98$\pm$0.25 $\mu$b at kT=30 keV. This result is about 4 times higher than the thermal neutron capture cross section estimated in the earlier works assuming a $\dfrac{1}{v}$ law. The implications of our findings extend to the region of inhomogeneous big-bang models in nuclear astrophysics, where understanding the behaviour of neutron capture cross sections plays a crucial role in elucidating the intricate processes that shaped the early universe.
$^{12}\mathrm C(n,\gamma)^{13}\mathrm C$ 反应的宇宙影响:核天体物理学视角
我们对相关天体物理能量范围内$^{12}\mathrm C$的中子俘获截面进行了全面研究。通过严格的 R 矩阵分析,我们确定了在 kT=30 keV 时的 Maxwellian 平均截面为 11.98$\pm$0.25 $\mu$b。这一结果比早期工作中假设$\dfrac{1}{v}$定律估计的热中子俘获截面高出约4倍。我们研究结果的意义延伸到核天体物理学中的非均质大爆炸模型区域,在这一区域,理解中子俘获截面的行为对于阐明形成早期宇宙的复杂过程起着至关重要的作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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