本文件描述了通过伽马射线光谱法测定试样中伽马射线放射性核素的贝克勒尔活度（Bq）的方法。在适当的样品制备后，在测试实验室进行测量。测试样品可以是固体、液体或气体。申请包括: -对核设施或排放高水平天然放射性物质的场所释放的放射性进行常规监测有助于确定环境中放射性的演变调查事故和事件情况，以便计划补救措施并监督其有效性；-核退役活动产生的潜在污染废料的评估； -监测土壤、食品、饮用水、地下水、海水或污水污泥等介质中的放射性污染用于估算体内γ射线放射性核素放射性的摄入量（吸入、摄入或注射）的测量。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document describes the methods for determining the activity in becquerel (Bq) of gamma-ray emitting radionuclides in test samples by gamma-ray spectrometry. The measurements are carried out in a testing laboratory following proper sample preparation. The test samples can be solid, liquid or gaseous. Applications include: — routine surveillance of radioactivity released from nuclear installations or from sites discharging enhanced levels of naturally occurring radioactive materials;— contributing to determining the evolution of radioactivity in the environment;— investigating accident and incident situations, in order to plan remedial actions and monitor their effectiveness;— assessment of potentially contaminated waste materials from nuclear decommissioning activities;— surveillance of radioactive contamination in media such as soils, foodstuffs, potable water, groundwaters, seawater or sewage sludge;— measurements for estimating the intake (inhalation, ingestion or injection) of activity of gamma-ray emitting radionuclides in the body.All current amendments available at time of purchase are included with the purchase of this document.