在10~(-10)秒级的时间间隔测量(如正电子湮没寿命谱测量,核激发态寿命测量及粒子飞行时间测量等)中,塑料闪烁探测器是常用的性能良好的探测器。探测装置主要由塑料闪烁体、光电倍增管及以时间-脉冲幅度转换器为中心的一套电子设备组成。仪器系统定时分辨的能力主要由所用光电倍增管、定时电路及塑料闪烁体的性能决定。就闪烁体而言,它的发光过程是重要影响因素,发光效率高、发光衰减时间短的闪烁体一般获 Plastic scintillation detectors are commonly used detectors of good performance at intervals of 10 to 10 seconds (such as positron annihilation lifetime measurements, nuclear extinction lifetime measurements, and particle flight time measurements). The detection device is mainly composed of plastic scintillator, photomultiplier tube and a set of electronic equipment centering on time-pulse amplitude converter. The ability of the instrumentation system to determine timing is mainly determined by the performance of the photomultiplier tubes, timing circuits, and plastic scintillators used. The scintillator, its light-emitting process is an important factor, the luminous efficiency, the luminous decay time is short, the general scintillator