activity per unit volume of the sample
Note 1 to entry: This quantity is expressed in becquerels per cubic metre (Bq/m3). Note 2 to entry: For a gas it is necessary to indicate the temperature and pressure conditions for which the volumetric activity expressed in becquerels per cubic metre is measured. For example, under standard temperature and pressure (STP). Note 3 to entry: This entry was numbered 393-14-16 in IEC 60050-393:2003.
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