摘要
介绍放射性仪表的基本测量原理、γ射线对衰减系数的影响参数,列举了几种常见屏蔽介质的衰减系数与屏蔽层厚度之间的关系;阐述石油化工装置中常见放射性料位仪表的测量形式,不同形式的放射源与探测器适用的场合、测量特点及安装要求;明确了放射源活度的选择和影响计算的要素。
This paper gives a brief description of basic measuring principle of radioactive instruments, the calculation of attenuation coefficient of gamma ray and parameters influencing calculation, introduces the relationship between attenuation coefficients of several common shielding medium and the shielding layer thickness, and elaborates the measurement form of common radioactive level meters, the different forms of radioactive source,the detector applicable occasions,measuring characteristic analysis and installation requirements. The selection of radioactive source activity and the factors to influence calculation are also discussed.
出处
《大氮肥》
CAS
2013年第2期136-138,141,共4页
Large Scale Nitrogenous Fertilizer Industry
关键词
放射源
探测器
衰减系数
活度
radiation source
detector
attenuation coefficient
natural background activity
