Exploration of direct neutron capture with covariant density functional theory inputs
Exploration of direct neutron capture with covariant density functional theory inputs
复制标题
用协变密度泛函理论输入直接中子俘获的探索
DOI：
10.1103/physrevc.91.045802
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发表时间：
2015
影响因子：
3.1
通讯作者：
Kozub R. L.
中科院分区：
文献类型：
--
作者：
Zhang Shi-Sheng;Peng Jin-Peng;Smith M. S.;Arbanas G.;Kozub R. L.
直接中子俘获的预测对于超新星、合并中子星和其他天体物理环境中的核合成模拟至关重要。我们计算直接捕获截面使用核结构信息从协变密度泛函理论作为输入的FRESCO耦合反应通道代码。我们研究了配对、光谱因素和光学势对我们结果的影响，以确定一种计算奇异核直接中子俘获截面的稳健方法。我们的预测与实验结果相当吻合，对于闭合壳层核16 O和48 Ca，以及奇异核36 S。然后，我们使用这种方法来计算的双魔不稳定核132 Sn的直接中子俘获截面的天体物理r过程的兴趣。
Predictions of direct neutron capture are of vital importance for simulations of nucleosynthesis in supernovae, merging neutron stars, and other astrophysical environments. We calculated direct capture cross sections using nuclear structure information obtained from a covariant density functional theory as input for the FRESCO coupled reaction channels code. We investigated the impact of pairing, spectroscopic factors, and optical potentials on our results to determine a robust method to calculate cross sections of direct neutron capture on exotic nuclei. Our predictions agree reasonably well with experimental cross section data for the closed shell nuclei 16 O and 48 Ca, and for the exotic nucleus 36 S. We then used this approach to calculate the direct neutron capture cross section on the doubly magic unstable nucleus 132 Sn which is of interest for the astrophysical r-process.