论文标题
半经验模型，以确定中和后裂变产物产物的产量和中子多样性
Semi-empirical model to determine pre- and post-neutron fission product yields and neutron multiplicity
论文作者
论文摘要
中子发射裂变产物质量分布是通过使用中性发射裂变产物产量（FPY）和中子多重性来计算的。首先，使用半经验模型来计算中性fpy。然后，使用每个裂变片段质量的中子多重性将前fpy转换为中消失后FPY。在这样做的过程中，假设是为了使质量数$ a^*$的排放前裂变片段衰减到具有质量数$ a $的排放后片段。将所得的无内核后FPY与可用数据进行了比较。不仅可以使用前后FPY和中子多样性的实验数据的系统，还包括$^{233} $ U的热中子诱导的裂变，$^{235} $ u和$^{239} $ pu。因此，我们将模型计算应用于这些系统，并将计算结果与GEF的计算结果以及来自ENDF和EXFOR库的数据进行了比较。使用半经验模型和中子多样性计算出的中性裂变前后裂变产物质量分布都重现了实验数据的整体特征。
Post-neutron emission fission product mass distributions are calculated by using pre-neutron emission fission product yields (FPYs) and neutron multiplicity. A semi-empirical model is used to calculate the pre-neutron FPY, first. Then the neutron multiplicity for each fission fragment mass is used to convert the pre-neutron FPY to the post-neutron FPY. In doing so, assumptions are made for the probability for a pre-emission fission fragment with a mass number $A^*$ to decay to a post-emission fragment with a mass number $A$. The resulting post-neutron FPYs are compared with the data available. The systems where the experimental data of not only the pre- and post-neutron FPY but also neutron multiplicity are available are the thermal neutron-induced fission of $^{233}$U, $^{235}$U and $^{239}$Pu. Thus, we applied the model calculations to these systems and compared the calculation results with those from the GEF and the data from the ENDF and the EXFOR libraries. Both the pre- and post-neutron fission product mass distributions calculated by using the semi-empirical model and the neutron multiplicity reproduce the overall features of the experimental data.
