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为了在低强度脉冲伽马辐射测量中获得更精密可靠的测试数据,对La Cl3(50 mm×30 mm)、YAG∶Yb(50mm×50 mm)两种新型闪烁探测器和常用Ce F3(45 mm×20 mm)闪烁探测器的灵敏度、伽马/中子甑别能力、时间响应特性、统计涨落等主要参量进行了实验测量和对比。实验测量结果表明:La Cl3闪烁探测器灵敏度最高;伽马/中子甑别能力比另两种闪烁探测器高1倍以上;时间响应与Ce F3闪烁探测器相当;统计涨落最小(测点注量率相当的情况下)。进行中子、伽马混合脉冲辐射场中的低强度脉冲伽马辐射测量时,三种闪烁探测器中,La Cl3闪烁探测器是一种更佳的实用候选闪烁探测器。
In order to obtain more accurate and reliable test data in low-intensity pulsed gamma-ray radiation measurement, two novel scintillation detectors, La Cl3 (50 mm × 30 mm) and YAG: Yb (50 mm × 50 mm) (45 mm × 20 mm) scintillation detector sensitivity, gamma / neutron discriminating ability, time response characteristics, statistical fluctuations and other major parameters were measured and compared. The experimental results show that the La Cl3 scintillation detector has the highest sensitivity; the gamma / neutron discrimination ability is more than double that of the other two scintillation detectors; the time response is comparable to that of the Ce F3 scintillation detector; the minimum statistical fluctuation The case of the same volume rate). Of the three scintillation detectors, the La Cl3 scintillation detector is a better candidate scintillation detector for low-intensity pulsed gamma-ray measurements in neutron and gamma mixed pulsed radiation fields.