【作者】 徐咏梅； 刘丽乐； 舒能川； 陈永静； 刘廷进； 孙正军；

【Author】 XU Yong-mei;LIU Li-le;SHU Neng-chuan;CHEN Yong-jing;LIU Ting-jin;SUN Zheng-jun;China Nuclear Data Center,China Institute of Atomic Energy;

【机构】 中国原子能科学研究院核数据重点实验室；

【摘要】 本工作在多模式无规颈断裂模型的基础上,通过简化位能曲面的表示方式,加入温度相关的壳效应能,建立了中子诱发²³⁸U裂变的唯象模型。同时收集评价了中子诱发²³⁸U裂变产额的实验数据,用于模型参数的求解。利用该模型和评价得到的实验数据,研究了0²0 MeV中子诱发²³⁸U裂变产物的质量分布和产额能量关系,计算得到的质量分布与实验数据符合较好,可以预测没有能点区域的产额质量分布。更多还原

【Abstract】 Based on the Multi-Modal Random Neck-Rupture Model（Brosa model）,a phenomenological model of n + ²³⁸U fission is created with simplified potential energy express and corrected shelleffect as a function of energy.The experimental data n + ²³⁸U of fission yield were collected and evaluated to deduce the model parameters.With the above phenomenological model and experimental data,the yields of mass distribution and energy-dependence were calculated from 0²0Mev range,and the result was showed that the mass distributions well agreed with the experimental data.The model could predict yields without available measured data.更多还原