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LEA can, on request, adapt the activity and the geometry of catalog sources to a specific need. Here are six examples.
To carry out Babyline checks (Babyline 81™ MIRION Technologies), LEA offers a source kit specially adapted to the operating range of this portable survey meter.
The kit is composed of 4 sources of 90Sr, with activity levels of 0.07μCi (2.5kBq), 0.81μCi (30kBq), 8.1μCi (300kBq) and 94.6μCi (3.5MBq). Other radionuclides and other activities are available on request.
In practice, samples measured by alpha spectrometry are often deposited in planchets before insertion into the measurement system. LEA can manufacture sources adapted to your equipment by depositing the radionuclides to planchets of your own supply.
The diameter of the active surface can vary from 0.6 in (15 mm) to 2.8 in (70 mm) and accommodate all alpha emitters proposed by the LEA, for activities ranging from 0.003 μCi (100 Bq) to 0.05 μCi (2 kBq).
To facilitate checks on radiation protection probes, LEA offers racket-type source holder, embedding one or more sources suited to the radiological work environment.
One of the most used source combinations consists of a 239Pu source of 0.01 μCi (400 Bq) and a 90Sr source of 0.01 μCi (400 Bq).
Rackets are also available for all radionuclides and activities of ESA type sources. Rackets can also be delivered with a summary document specifying the operating ranges associated with the radiation protection devices used in the installation.
The use of a radioactive source is one of the methods for correcting the gain of the on-board acquisition electronics in the portable systems used by the fire brigade or army to identify a possible radiological threat. The radioactive source is chosen to generate a signal outside the region of interest.
For the NaI detectors, typically used sources are point sources of 241Am or 137Cs, with a nominal activity of 0.002 μCi (70 Bq) or 0.02 μCi (700 Bq), mounted inside the scintillator. The system adjusts the electronic gain to maintain the peak position (generated by the 3 alpha rays of the 241Am between 5.4 and 5.5 MeV or the 137Cs gamma ray of 662 keV).