The photofission fragment mass yields of actinides are evaluated using a systematic statistical scission point model. In this model, all energies at the scission point are presented as a linear function of the mass numbers of fission fragments. The mass yields are calculated with a new approximated relative probability for each complementary fragment. The agreement with the experimental data is quite good, especially with a collective temperature T_col of 2 MeV at intermediate excitation energy and T_col = 1 MeV for spontaneous fission. This indicates that the collective temperature is greater than the value obtained by the initial excitation energy. The generalized superfluid model is applied for calculating the fragment temperature. The deformation parameters of fission fragments have been obtained by fitting the calculated results with the experimental values. This indicates that the deformation parameters decrease with increasing excitation energy. Also, these parameters decrease for fissioning systems with odd mass numbers.

a系元素的光裂变片段质量产率是使用系统的统计分裂点模型评估的。在该模型中，断裂点的所有能量均表示为裂变碎片质量数的线性函数。对于每个互补片段，以新的近似相对概率计算质量产率。与实验数据的一致性很好，尤其是在集体温度下Ť_关口 在中间激发能下的2 MeV Ť_关口自发裂变= 1 MeV。这表明集体温度大于通过初始激发能获得的值。将广义超流体模型用于计算碎片温度。通过将计算结果与实验值拟合得到裂变碎片的变形参数。这表明变形参数随着激发能的增加而减小。同样，对于具有奇数质量的裂变系统，这些参数也会减小。