一、引言目前,广泛研究了用塑料薄膜闪烁探测器测量带电粒子的各种性能,由于这种闪炼体对γ射线很不灵敏,无辐照损伤,响应时间快,脉冲幅度随入射粒子能量的不同而变化,以及易于制备等,所以用它测量轻、重带电粒子(例如裂变碎片)是一种相当好的探测器。裂变碎片相对于天然α的脉冲幅度比,在实际工作中是一个有用的数据。早在1954年米尔顿(C.D.Milton)等人就用芪晶体测量过~(233)U的热中子裂变碎片与其天然α脉 I. INTRODUCTION At present, extensive research has been conducted on the measurement of various properties of charged particles using a plastic film scintillation detector. Since this type of flash is very insensitive to γ-rays and has no irradiation damage and fast response time, the pulse amplitude varies with incident particle energy And so on, and so easy to prepare, so use it to measure light, heavy charged particles (such as fission fragments) is a very good detector. The fission debris relative to the natural α pulse amplitude ratio, in fact, is a useful data. As early as 1954, C. D. Milton et al. Measured the thermal neutron fission fragments of ~ (233) U and their natural alpha veins