在探矿、示踪原子的应用与輻射防护工作中,常有在β,γ混合輻射中分別测量丫射线剂量(或通量)与β粒子通量的必要。通常使用計数管作探測元件的β,γ輻射仪均有类似于图1的結构。指示仪表的讀数取决于計数管单位时間內所計的粒子数。不同的仪器有不同的 In the application of prospecting and tracer atoms and radiation protection work, it is often necessary to measure the dose (or flux) of gamma rays and the flux of beta particles respectively in the mixed radiation of beta and gamma. The β, γ radiometer that usually uses the counting tube as the detecting element has a structure similar to that of FIG. 1. The indicator reading depends on the number of particles counted in the unit of time. Different instruments have different