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Ampoules of standard gases (tritium, krypton 85, xenon 133) are used for
Gases in metal bottles are used for calibrating atmospheric contamination monitors used in environmental monitoring (in industrial chimney stacks, nuclear power plants, etc.).
Gases packaged in ampoules are characterized in terms of activity concentration (STP conditions, STP volume = 3 cm3) between 4 x 103 and 4 x 107 Bq.cm-3.
Sealed glass ampoules (type A) have a type 1 standard ground joint (socket). The volume of 30 cm3 is determined to 0.5% uncertainty (k = 2).
Mixtures of a radioactive gas (3H, 85Kr or 133Xe) with a carrier gas (nitrogen), characterized in terms of activity concentration
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