Direct capture in the 130 Sn(n,γ) 131 Sn and 132 Sn(n,γ) 133 Sn reactions under r-process conditions
Direct capture in the 130 Sn(n,γ) 131 Sn and 132 Sn(n,γ) 133 Sn reactions under r-process conditions
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r工艺条件下 130 Sn(n,γ) 131 Sn 和 132 Sn(n,γ) 133 Sn 反应中的直接捕获
DOI：
10.1103/physrevc.86.068803
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发表时间：
2012
影响因子：
3.1
通讯作者：
P. Mohr
中科院分区：
文献类型：
--
作者：
P. Mohr
在直接俘获模型中计算了$^{130}$Sn(n,$\gamma$)$^{131}$Sn和$^{132}$Sn(n,$\gamma$)$^{133}$Sn反应在低于1.5\，MeV的低能下的截面。利用$^{130}$Sn和$^{132}$Sn上的（d,p）转移实验的最新数据，可以避免具有固有不确定性的全局输入参数，并通过局部调整确定直接捕获模型的所有输入。计算得到的$^{130}$Sn和$^{132}$Sn的直接俘获截面几乎相同，不确定性小于1 / 2。随着温度的升高，恒星反应速率N_A $略有增加。最后给出了低洼共振对恒星反应速率影响的估计。
The cross sections of the $^{130}$Sn(n,$\gamma$)$^{131}$Sn and $^{132}$Sn(n,$\gamma$)$^{133}$Sn reactions are calculated in the direct capture model at low energies below 1.5\,MeV. Using recent data from (d,p) transfer experiments on $^{130}$Sn and $^{132}$Sn, it is possible to avoid global input parameters with their inherent uncertainties and to determine all input to the direct capture model by local adjustments. The calculated direct capture cross sections of $^{130}$Sn and $^{132}$Sn are almost identical and have uncertainties of less than a factor of two. The stellar reaction rates $N_A $ show a slight increase with temperature. Finally an estimate for the influence of low-lying resonances to the stellar reaction rates is given.