Abstract：
In this paper we want to study (n,3n) reactions using an empirical formula derived on the basis of the statistical model considering reaction Q-value dependence. This formula was obtained by taking into account the exponential dependence on asymmetry parameter (N-Z)/A for neutron-induced reactions in Levkovskii\'s empirical formula. In addition, the present formula depends also on incident energy En, reaction Q-value and symmetry term (N-Z)2/A. Herein, a new analysis of experimental data of (n,3n) reactions in the energy region 22-27.5 MeV was carried out for quick estimation of cross sections of the heavy mass isotopes of odd Z-even N nuclides in the region of A = 151 to 209. We observed a good agreement of the experimental cross section data with the calculations performed using the present empirical formula.
摘要：
在本文中，我们要研究(n，3n）使用基于考虑反应Q值依赖性的统计模型得出的经验公式进行反应。该公式是通过考虑Levkovskii经验公式中中子诱导反应对不对称参数（N-Z）/A的指数依赖性而获得的。此外,目前的公式还取决于入射能量En，反应Q值和对称项(N-Z)2/A。在这里，对(n，3n）在能量区域22-27.5MeV中进行了反应，以快速估算A=151至209区域中奇偶Z-偶数N核素的重质量同位素的横截面。我们观察到实验横截面数据与使用本经验公式进行的计算非常吻合。
