SS-ISO 11929-4:2022
Determination of the characteristic limits (decision threshold, detection limit and limits of the coverage interval) for measurements of ionizing radiation — Fundamentals and application — Part 4: Guidelines to applications (ISO 11929-4:2022, IDT)
- 標準號
- SS-ISO 11929-4:2022
- 發布單位
- SIS
- 當前最新
- SS-ISO 11929-4:2022
- 被代替標準
- SS-ISO 11929-4:2020
- 適用范圍
- This document specifies a procedure, in the field of ionizing radiation metrology, for the 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. ISO 11929 has been divided into four parts covering elementary applications in?ISO?11929-1, advanced applications on the basis of the ISO/IEC Guide 98-3:2008/Suppl.1 in ISO 11929-2, applications to unfolding methods in ISO 11929-3, and guidance to the application in ISO 11929-4. ISO 11929-1 covers basic applications of counting measurements frequently used in the field of ionizing 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 ISO 11929-1:2019, Annex?A the special case of repeated counting measurements with random influences and in ISO?11929-1:2019, Annex?B, measurements with linear analogous ratemeters are covered. ISO 11929-2 extends ISO?11929-1 to the evaluation of measurement uncertainties according to the ISO/IEC?Guide?98-3:2008/Suppl.1. ISO 11929-2 also presents some explanatory notes regarding general aspects of counting measurements and Bayesian statistics in measurements. ISO 11929-3 deals with the evaluation of measurements using unfolding methods and counting spectrometric multi-channel measurements if evaluated by unfolding methods, in particular, alpha- and gamma-spectrometric ...