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n, γ混合脉冲辐射场中, 在近距离、辐射强度低且中子辐射峰值比被测γ辐射峰值强度高的情况下, 传统γ辐射探测技术实施起来面临困难. 对PbWO4和CeF3等近年国内新研制的无机闪烁体进行了系列研究, 使用CeF3分别配光电倍增管和光电管, 组合出了对γ辐射灵敏度高, 对中子相对不灵敏, 同时脉冲响应也快的光电探测系统, 应用以此为基础的探测技术在近距离n, γ混合脉冲辐射场中, 可将脉冲γ辐射探测信噪比提高一个量级以上.
In the mixed pulse radiation field of n and γ, the traditional gamma radiation detection technology is difficult to implement in the short distance, low radiation intensity and the peak value of neutron radiation is higher than the peak intensity of the measured gamma radiation.For PbWO4 and CeF3, The newly developed inorganic scintillator has been studied in series. Using CeF3 with photomultiplier tubes and phototransistors, a photodetection system with high sensitivity to γ radiation, relatively insensitive to neutrons and fast impulse response is used. Based on this detection technique, the signal-to-noise ratio of pulse gamma radiation can be increased more than one order of magnitude in the close-range n, γ mixed pulse radiation field.