辐射防护仪器食品中γ放射性核素活度浓度测量设备

[中文适用范围]： 本文件适用于用于测量食品和/或食品中发射伽马射线的放射性核素的活度和/或活度浓度的仪器。本文件适用于作为总计数型仪器和脉冲高度分析型仪器在野外条件和测量设施中使用的仪器。本文件不适用于使用锗探测器的高分辨率光谱仪。适用于本文件的仪器可用于测量各种样本（如土壤、污水、植物和动物生命）中发射伽马射线的放射性核素的活度和活度浓度。本文件的目的是建立性能要求，提供测试方法，并指定一般特征、一般测试条件以及用于确定仪器是否符合本文件要求的放射性、环境、机械和电磁特征。测试结果为最终用户和制造商提供有关仪器可靠测量发射伽马射线的放射性核素的活度和/或活度浓度的能力的信息。本文件不适用于样本制备。 [外文原描述]： IEC 61563:2019 applies to instruments used to measure the activity and/or activity concentration of gamma-emitting radionuclides in food and/or foodstuffs. This document applies to instruments used both as gross count type instruments and pulse height analysing type instruments used in field conditions and in measurement facilities. This document does not apply to high-resolution spectrometers that use germanium detectors. The instruments to which this document applies can be used to measure the activity and activity concentration of gamma-emitting radionuclides for a wide variety of samples, such as soil, sewage, plant, and animal life. The object of this document is to establish performance requirements, to provide test methods and to specify general characteristics, general test conditions, and radiological, environmental, mechanical and electromagnetic characteristics to be used to determine whether an instrument meets the requirements of this document. The test results provide information to end-users and manufacturers regarding the capability of instrument for reliable measurement of the activity and/or activity concentration of gamma-emitting radionuclides. This second edition cancels and replaces the first edition published in 2001. This edition includes the following significant technical changes with respect to the previous edition: a) The previous edition applied to handheld-type and portable-type instruments. This edition applies to transportable-type and installed-type instruments, as well as the scope of the previous edition. The handheld-type and portable-type instruments are mainly used in case of a post accidental situation, however, the transportable-type and installed-type instruments can be used through recovery phase. b) Uncertainty of measurement according to GUM is introduced. c) Detection limit defined in ISO 11929 is introduced to specify a minimum detectable activity. d) Environmental requirements, mechanical requirements and electromagnetic requirements are updated according to IEC 62706. e) Sample format of measuring report is introduced