本文介绍的携带式直读镭（铀）钍含量仪，由于使用CMOS器件设计的脉冲幅度分析器，采用稳谱技术、模拟运算、扣除康普顿散射影响后，有了较好的性能指标，仪器简单轻便、操作容易，适用于野外普查找矿。

This paper describes a portable three-channel spectrometer

by which you can read the contents of Radium (Uranium) -Thorium directly. In this instrument pulse amplitude analysers are designed with CMOS devices. By using automatic spectral stabilization system

analogue calculation method and automatic compton stripping

the instrument has a set of features of advanced existing spectrometers. In addition

the construction of the instrument is simple

compact

the weight is light and it is easy to operate for the field survey.