Reference number
ISO 11665-2:2019
© ISO 2025
International Standard
ISO 11665-2:2019
Measurement of radioactivity in the environment — Air: radon-222 — Part 2: Integrated measurement method for determining average potential alpha energy concentration of its short-lived decay products
Edition 2
2019-09
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Published (Edition 2, 2019)
This publication was last reviewed and confirmed in 2025. Therefore this version remains current.

ISO 11665-2:2019

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Abstract

This document describes integrated measurement methods for short-lived radon‑222 decay products[4]. It gives indications for measuring the average potential alpha energy concentration of short‑lived radon-222 decay products in the air and the conditions of use for the measuring devices.

This document covers samples taken over periods varying from a few weeks to one year. This document is not applicable to systems with a maximum sampling duration of less than one week.

The measurement method described is applicable to air samples with potential alpha energy concentration of short-lived radon-222 decay products greater than 10 nJ/m3 and lower than 1 000 nJ/m3.

NOTE For informative purposes only, this document also addresses the case of radon-220 decay products, given the similarity in behaviour of the radon isotopes 222 and 220.

General information

  • Status
     : Published
    Publication date
     : 2019-09
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 2
    Number of pages
     : 13
  • Technical Committee :
    ISO/TC 85/SC 2
    ICS :
    17.240  13.040.01 
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