以比较的方法，介绍了ISO CS系统无源刻度测量方法相对于传统环境样品放射性测量方法的优点。
This paper introduces the advantages of ISOCS measurement method by efficiency calibration without a radioactive source, comparing with traditional measurement methods of environment samples.
介绍了尿素汽提塔液位计的安装方式、棒状源的结构、源的组合形式，及近似线性刻度计算。
The installation of level gauge used for urea stripping tower, the structure and forming of radioactive rod source, and the calculation of its approximate linear graduation are described.
对高纯锗探测器无源效率刻度方法的特点、建立方式、方法验证做了介绍。
The efficiency calibration and measurement of coincidence factors of an HPGe detector;
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