Gases

Gases are available in two types of containers : glass ampoules and metal bottles.

Ampoules of standard gases (tritium, krypton 85, xenon 133) are used for
calibrating gas-flow ionization chambers and Geiger-Müller or proportional counters used in the measurement of radioactive gases.

Gases in metal bottles are used for calibrating atmospheric contamination monitors used in environmental monitoring (in industrial chimney stacks, nuclear power plants, etc.).

• Ampoules

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).

• Bottles

Mixtures of a radioactive gas (³H, ⁸⁵Kr or ¹³³Xe) with a carrier gas (nitrogen), characterized in terms of activity concentration
(200 Bq.cm^-3 STP) are compressed in an aluminum alloy bottle that complies with French standards.
Tritium, krypton 85 and xenon 133 are supplied in type E bottles. Krypton 85 can be supplied in type B bottles.

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For a custom source request, contact LEA.

Radionuclides

• Krypton 85 (⁸⁵Kr)
• Tritium (³H)
• Xenon 133 (¹³³Xe)
• Yttrium 88 (⁸⁸Y)