^(240)Pu自发裂变气体产物产额的唯像模型研究

Research on Spontaneous Fission Yield of Gas Product for ^(240)Pu with Phenomenological Model

基于裂变多模式无规颈断裂物理思想,建立了中子诱发^(239)Pu裂变、^(240)Pu自发裂变系统裂变产额计算的唯像模型。以实验数据为基础,利用最小二乘法确定了唯像模型参数。基于唯像模型计算的产额,结合实验数据系统规律进行分析和再评价,给出^(240)Pu自发裂变气体产物^(87,88) Kr和^(133,135) Xe的累积产额推荐值。

Based on the physics of multi-modal random neck rupture,a phenomenological model was developed to study the fission yield of 239 Pu neutron-induced fission and 240 Pu spontaneous fission system,where the model parameters were determined by the least square fitting with the available experimental data.The yields calculated with the phenomenological model were analysed and reevaluated,and the recommended fission yields of 87,88 Kr and 133,135 Xe from 240 Pu spontaneous fission were presented.