标准编号：ISO 18589-3:2015
中文名称：环境中辐射的测量 土壤 第3部分：γ放射性核素的测量
英文名称：Measurement of radioactivity in the environment — Soil — Part 3: Test method of gamma-emitting radionuclides using gamma-ray spectrometry
发布日期：2015-02
标准范围
This part of ISO 18589 specifies the identification and the measurement of the activity in soils of a largenumber of gamma-emitting radionuclides using gamma spectrometry. This non-destructive method,applicable to large-volume samples (up to about 3 000 cm3), covers the determination in a singlemeasurement of all the γ-emitters present for which the photon energy is between 5 keV and 3 MeV.This part of ISO 18589 can be applied by test laboratories performing routine radioactivitymeasurements as a majority of gamma-emitting radionuclides is characterized by gamma-ray emissionbetween 40 keV and 2 MeV.The method can be implemented using a germanium or other type of detector with a resolutionbetter than 5 keV.This part of ISO 18589 is addressed to people responsible for determining gamma-emitting radionuclidesactivity present in soils for the purpose of radiation protection. It is suitable for the surveillance of theenvironment and the inspection of a site and allows, in case of accidents, a quick evaluation of gammaactivity of soil samples. This might concern soils from gardens, farmland, urban or industrial sites thatcan contain building materials rubble, as well as soil not affected by human activities.When the radioactivity characterization of the unsieved material above 200 μm or 250 μm, made ofpetrographic nature or of anthropogenic origin such as building materials rubble, is required, thismaterial can be crushed in order to obtain a homogeneous sample for testing as described in ISO 18589-2.
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