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.

Cross References:
ISO/IEC 17025
IEC 61577-1
IEC 61577-3
ISO 11665-1
IEC 61577-4
ISO/IEC Guide 98-3
ISO 11929


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