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本工作在核裂变多通道无规颈断裂模型基础上,通过简化复杂的裂变多通道位能曲面理论,充分考虑壳效应,建立了物理概念清楚的温度相关的裂变产额的半经验理论模型。通过拟合大量的裂变实验数据,确定了模型的参数,计算给出了0～20MeV的裂变碎片的质量分布和产额能量关系。该工作进一步揭示了裂变机制及碎片的某些性质,发现并解释了裂变碎片不同核区的裂变产额能量关系的变化趋势及其规律,在解决产额能量关系上迈出了一大步,有望解决长期以来核工程所需要的而国内外一直不清楚的产额能量关系问题。
In this work, a semi-empirical theoretical model of temperature-dependent fission yield with a clear physical concept was established by simplifying the complex multi-channel potential energy surface theory of fission and taking shell effect into account. By fitting a large amount of fission experiment data, the parameters of the model are determined, and the relationship between the mass distribution and energy yield of the fission fragments at 0 ~ 20MeV is calculated. The work further revealed some characteristics of fission mechanism and debris, found and explained the trend and law of fission yield energy relationship in different nuclear fission fragments, and took a big step in solving the relationship between output and energy. It is expected to solve the problem of the energy yield of output that has long been unknown to nuclear engineering but not known at home and abroad.