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裂变产额是核工程需要的重要数据,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,定量地、系统地计算给出了0～20MeV的裂变碎片的质量分布。该工作进一步揭示了裂变机制及碎片的某些性质。本工作包括质量分布和产额能量关系的研究,本文主要阐述了质量分布的研究工作。
The fission yield is an important data needed for nuclear engineering. Based on the multi-channel random-necked fracture model of nuclear fission, by simplifying complex fission multi-channel potential energy surface theory and taking full account of the shell effect, a clear temperature-related physical concept Fission yield of the semi-empirical theoretical model. By fitting a large amount of fission experiment data, the parameters of the model were determined, and quantitatively and systematically calculated the mass distribution of fission fragments from 0 to 20 MeV. This work further reveals some of the fission mechanisms and the fragmentation nature. This work includes the study of the relationship between mass distribution and yield energy. This paper mainly describes the research work of mass distribution.