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arXiv 0912.0221nucl-th
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用唯象势模型研究轻放射性核俘获反应

Light radioactive nuclei capture reactions with phenomenological potential models

V. Guimaraes, C. A. Bertulani

摘要:

轻放射性核在许多天体物理环境中起着重要的作用。由于在天体物理学感兴趣的能量下,这些放射性核的某些中子和质子俘获反应的截面非常低,因此很难进行直接的实验室测量。对于像8Li和8B这样的放射性核,直接测量中子俘获反应是不可能的。间接方法已被应用于克服这些困难。在这项工作中,我们将报告的结果和讨论的唯象势模型用于确定一些质子和中子俘获反应。作为检验,我们给出了~(16)O(p,g)~(17)F_gs(5/2+)和~(16)O(p,g)~(17)F_ex(1/2+)俘获反应的结果,并计算了~(7 Li)(n,g)~(8Li)(n,g)~(9 Li)和~(8B)(p,g)~(9 C)俘获反应的核合成截面。

英文摘要:

Light radioactive nuclei play an important role in many astrophysical environments. Due to very low cross sections of some neutron and proton capture reactions by these radioactive nuclei at energies of astrophysical interest, direct laboratory measurements are very difficult. For radioactive nuclei such as 8Li and 8B, the direct measurement of neutron capture reactions is impossible. Indirect methods have been applied to overcome these difficulties. In this work we will report on the results and discussion of phenomenological potential models used to determine some proton and neutron capture reactions. As a test we show the results for the 16O(p,g)17F_gs(5/2+) and 16O(p,g)17F_ex(1/2+) capture reactions.We also computed the nucleosynthesis cross sections for the 7Li(n,g)8Li, 8Li(n,g)9Li and 8B(p,g)9C capture reactions.

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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