ISO 11929-3:2019
确定电离辐射测量的特征极限（决定阈值 检测限和覆盖区间限） - 基础与应用 - 第3部分:展开方法的应用

Determination of the characteristic limits (decision threshold, detection limit and limits of the coverage interval) for measurements of ionizing radiation — Fundamentals and application — Part 3: App

标准号

ISO 11929-3:2019

发布

2019年

发布单位

国际标准化组织

当前最新

ISO 11929-3:2019

 

 

引用标准

ISO 3534-1 ISO 80000-1 ISO 80000-10 ISO/IEC Guide 98-3 ISO/IEC Guide 99

适用范围

calculation of the “decision threshold”, the “detection limit” and the “limits of the coverage interval” for a non-negative ionizing radiation measurand when counting measurements with preselection of time or counts are carried out. The measurand results from a gross count rate and a background count rate as well as from further quantities on the basis of a model of the evaluation. In particular, the measurand can be the net count rate as the difference of the gross count rate and the background count rate, or the net activity of a sample. It can also be influenced by calibration of the measuring system, by sample treatment and by other factors. applications on the basis of the ISO/IEC Guide 98-3-1 in ISO 11929-2, applications to unfolding methods in this document, and guidance to the application in ISO 11929-4. radiation metrology. It is restricted to applications for which the uncertainties can be evaluated on the basis of the ISO/IEC Guide 98-3 (JCGM 2008). In Annex A of ISO 11929-1:2019, the special case of repeated counting measurements with random influences is covered, while measurements with linear analogous ratemeters, are covered in Annex B of ISO 11929-1:2019. according to the ISO/IEC Guide 98-3-1. ISO 11929-2 also presents some explanatory notes regarding general aspects of counting measurements and on Bayesian statistics in measurements. This document deals with the evaluation of measurements using unfolding methods and counting spectrometric multi-channel measurements if evaluated by unfolding methods, in particular, for alpha- and gamma-spectrometric measurements. Further, it provides some advice on how to deal with correlations and covariances. procedure and then presents a wide range of numerical examples. similar model of the evaluation is involved. Further practical examples can be found, for example, NOTE A code system, named UncertRadio, is available for calculations according to ISO 11929- 1 to //www​ .thuenen​ .de/en/fi/fields​ -of​ -activity/marine​ -environment/coordination​ -centre​ -of​ -radioactivity/uncertradio/. The download contains a setup installation file which copies all files and folders into a folder specified by the user. After installation one has to add information to the PATH of Windows as indicated by a pop-up window during installation. English language can be chosen and extensive “help” information is available. 

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