【摘 要】
：
对快中子引起的核反应作预平衡修正 ,即考虑直接 -半直接俘获作为统计平衡前 1激子态和 3激子态的γ发射过程 ,5个及 5个以上激子态的粒子 (中子、质子及α粒子等 )及γ发射
【机 构】
：
郑州大学物理系,郑州大学物理系 郑州450052rrrrrrrrrn,郑州450052
论文部分内容阅读
对快中子引起的核反应作预平衡修正 ,即考虑直接 -半直接俘获作为统计平衡前 1激子态和 3激子态的γ发射过程 ,5个及 5个以上激子态的粒子 (中子、质子及α粒子等 )及γ发射过程用达到统计平衡的复合核过程描述 ,在中子入射能量 3MeV至 2 0MeV能区对 4 0 Ca和 2 0 8Pb的辐射俘获截面进行了理论计算并与实验结果作了比较 ,得到了较好符合的结果 .同时 ,对统计平衡前后γ发射对 (n ,γ)截面的贡献及直接俘获、半直接俘获和两者的相干项的特性进行了讨论
For the pre-equilibrium correction of the neutron-induced nuclear reaction, consider the direct-semi-direct capture as a statistical equilibrium 1 exciton and 3 exciton γ emission process, 5 and 5 exciton particles Proton and α particles, etc.) and the γ emission process to achieve a statistical balance of the composite nuclear process described in the neutron incident energy 3MeV 20MeV energy area of 4 0 Ca and 208Pb radiation capture cross section theoretical calculations and Compared with the experimental results, the good results are obtained.At the same time, the contribution of γ emission to (n, γ) cross section and the characteristics of direct capture, semi-direct capture and the coherence terms of both before and after the statistical equilibrium are discussed
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