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利用中子诱发233U裂变的相关实验数据,得到裂变总激发能在互补裂变碎片中的分配方式。利用费米气体模型计算碎片核温度,并区分常温区和非常温区。利用统计蒸发模型计算入射能量低于6 MeV的中子诱发233U裂变瞬发中子谱(热能点和0.55 MeV能点),并与EXFOR库中可检索到的实验测量结果进行比较(图1)。计算结果与实验数据符合很好,表明本工作采用的模型机制和半经验方法是合理和有效的。半经验方法也许可评价中子诱发其他锕系核裂变瞬发中子谱。
Using the experimental data of neutron induced 233U fission, the distribution of total fission excitation energy in complementary fission fragments was obtained. The Fermi gas model is used to calculate the temperature of the fragment nucleus and to distinguish the normal temperature region from the very cold region. The 233U fission instantaneous neutron spectrum (thermal energy point and 0.55 MeV energy point) was calculated using the statistical evaporation model for neutrons with an incident energy of less than 6 MeV and compared with the searchable experimental measurements in the EXFOR library (Figure 1) . The calculated results are in good agreement with the experimental data, indicating that the model mechanism and semi-empirical method adopted in this work are reasonable and effective. Semi-empirical methods may be able to evaluate neutron induced other actinuclear fission prompt neutron spectrum.