标题： 涉及轻核的天体物理感兴趣核反应 显示英文标题

标题： Nuclear Reactions of Astrophysical Interest Involving Light Nuclei

摘要： 关于核合成的介绍，包括大爆炸、星际物质和恒星中元素的形成。 两步过程$^4$He(2n,$\gamma$)$^6$He 和逆光致分解$^6$He($\gamma$,2n)$^4$He 涉及晕核$^6$He 可能在 II 型超新星的$\alpha$-过程中具有重要意义。 上述过程的反应速率使用三体方法计算，与之前采用的值相比增强了三个数量级以上。 直接捕获计算给出了上述反应速率相似的值。 因此，该方法也被用来计算两步过程的反应速率$^6$He(2n,$\gamma$)$^8$He 和$^9$Li(2n,$\gamma$)$^{11}$Li 以及逆光致分解反应$^8$He 和$^{11}$Li，这些可能在$\alpha$-过程中有重要意义。 显示英文摘要

摘要： An introduction to nucleosynthesis, the creation of the elements in the big bang, in interstellar matter and in stars is given. The two--step process $^4$He(2n,$\gamma$)$^6$He and the reverse photodisintegration $^6$He($\gamma$,2n)$^4$He involving the halo nucleus $^6$He could be of importance in the $\alpha$--process in type--II supernovae. The reaction rates for the above processes are calculated using three--body methods and show an enhancement of more than three orders of magnitude compared to the previous adopted value. Direct--capture calculations give similar values for the above reaction rates. Therefore, this method was also used to calculate the reaction rates of the two--step processes $^6$He(2n,$\gamma$)$^8$He and $^9$Li(2n,$\gamma$)$^{11}$Li and the reverse photodisintegration of $^8$He and $^{11}$Li that could be also of importance in the $\alpha$-process.