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圆柱形裂变核材料2 3 5U或2 3 9Pu装置中各点所发射的γ射线到达探测器前经过材料自身的吸收距离没有球对称性 .通过对吸收的几何分析 ,获得了在与圆柱轴垂直方向上的自吸收修正因子的分析表达式 .由于γ吸收系数 μ是γ能量的函数 ,由此可以计算出不同能量γ的强度比与γ出射方向的关系 ,从而可以获得核装置本身的几何形状和大小的信息 .这一研究对有关核材料的监控、核查等安全保障技术有重要应用价值
The cylindrical fissile nuclear material 2 3 5U or 2 3 9Pu device at each point of the emitted γ-rays before reaching the detector through the material’s own absorption distance without spherical symmetry.By the absorption of the geometric analysis obtained was perpendicular to the cylindrical axis Since the γ absorption coefficient μ is a function of γ energy, the relationship between the intensity ratio of different energy γ and the γ emission direction can be calculated, so that the geometry of the nuclear device itself can be obtained And size of the information.This research on the nuclear material monitoring, verification and other security technology has important application value