ELS liquid sources

The specific activity of our liquid sources is characterized by means of Nal scintillators, HPGe semi-conductors or liquid scintillation analyzers.

They are calibrated under COFRAC* protocols. The measurement uncertainty varies between 1% and 8% depending on the radionuclide and the geometry.

Activities
The specific activity levels available as catalog reference are:

• 0. 001 μCi/g (0.04 kBq/g)
• 0.01 μCi/g (0.4 kBq/g)
• 1.1 μCi/g (40 kBq/g)
• 21.6 μCi/g (800 kBq/g)
• 261.2 μCi/g (8 000 kBq/g)

Standard geometries

• Ampoules
• V-Vial bottles
• Penicillin bottles
• Standardized bottles

How to compose reference/product no.:

Replace [Type] and [Act] with the letter and the value according to the required geometry and activity.

For example, a 5ml ampoule (Type B) containing 1.1 μCi/g (40 kBq/g) of Cs-137 is referenced as
Cs137 ELS B 40kBq/g.

Geometries [Type]:
Ampoules: A or B
V-Vial: U, V or W
Penicillin: D, J* or L

Activity [Act]
0.04 kBq/g (0. 001 μCi/g)
0.4 kBq/g (0.01 μCi/g)
40 kBq/g (1.1 μCi/g)
800 kBq/g (21.6 μCi/g)
8000 kBq/g (261.2 μCi/g)

Standard manufacturing tolerance : ± 30% • IAEA Category : 5

** The 12ML01 mixture – Am-241, Cd-109, Ce-139, Co-57, Co-60, Cr-51, Cs-137, Sn-113, Mn-54, Zn-65, Sr-85, Y-88 – generates around 15 peaks over an energy range from 60 keV to 1836 keV. The quantity of each radionuclide is chosen so that the counting rates of the main peak of each radionuclide are the same order of magnitude. See below for additional information on the 12ML01 mixture and on the other mixes available. Other geometries are available on request.

Emission Spectrum

Any other mix of Am-241, Ba-133, Co-60, Cs-137 and Eu-152 can be produced on request for specific activities.