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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. It is difficult to detect low intensity γ radiation by using traditional γ radiation detection technique in a close distance n, γ commix pulse radiation field with very high intensity neutron radiation. PbWO4 and CeF3 which are newly developed inorganic scintillator in our country have been studied. Photoelectricity detector systemes which have high γ sensitivity and relative insensitive to neutron and fast time response were assembled by using CeF3 and photomultiplier tube. The ratio of signal to noise for γ ray detection can be up to more than 10 times in close distance n, γ commix pulse radiation field by using this detector system. 相似文献
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脉冲DT中子场中的CeF3、ST401 闪烁探测器输出比对 总被引:1,自引:0,他引:1
本工作对国内近年新研制的CeF3用于γ测量时的抗中子干扰能力进行研究,在脉冲DT中子源场中对分别由CeF3和ST401构成的闪烁探测器输出进行比较测量.在相同测点中子注量率情况下的测量结果表明:ST401探测器的输出电荷比同体积的CeF3高10多倍;ST401探测器的电流输出峰值幅度比同体积的CeF3高30多倍.由此可得到CeF3对中子相对不灵敏,在n、γ混合辐射场中测量快γ辐射时,该无机晶体将是一种较合适的候选闪烁体. 相似文献
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