Tailor-made standard sources

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Based on your needs and specifications, an internal study is initiated to validate:

the production feasibility (manufacturing and measuring if necessary) of the source in accordance with the scope of the LEA's license,
the possibility to issue a calibration certificate under COFRAC* accreditation,
the level of uncertainty of the measurement,
the type of packaging and associated transport,

or we will suggest a catalog source close to your desired specification.

This feasibility study also helps defining the price and schedule associated with the requested supply. If the source is close to one of our catalog references, the completion time can be very short (a few weeks).

For more complex cases, requiring R&D and/or an LEA license upgrade, the time associated with the study and the necessary funding are then communicated to you for prior validation.

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Specific mix of radionuclides

LEA proposes alpha and gamma multi-nuclides sources. LEA can also offer tailor-made multinuclides standards (from 3 to 12 nuclides). The percentage of each nuclide in the mixture can be specified by the customer. Default is the same activity for each radionuclide.

Specific activities or emission rates

In terms of uncertainty, the COFRAC* scope defines the minimum level that LEA can provide under accreditation. If a COFRAC* certificate is not required, we may be able to offer reduced uncertainties; consult us for this.

Reduced or specific manufacturing tolerance

Insofar that its manufacturing capabilities allow, LEA can offer tailor-made products with a reduced or asymmetrical manufacturing tolerance: for example, - 0% / 30% thus guaranteeing a minimum activity to ensure sufficient counting on your device, or conversely, -30% / -0% guaranteeing maximum activity to avoid saturating your measurement chains or remain in compliance with your material possession license.

Specific active diameter

Depending on the size of your detectors, a different active surface may be required for the standard source.

Specific matrices

Sand, soil, cement, gas equivalents... we can study the production of tailor-made standards in matrices close to that which you require to control or characterize.

Specific dilution medium

The solutions manufactured by LEA are provided according to a given chemical composition (particularly dilution and molarity). A specific medium can be offered as a tailor-made product at your request.

Capsules

LEA proposes sealed sources in the form of capsules for activities < 27 μCi (1 MBq). For sealed sources > 27 μCi (1 MBq), ISO 2919 "radiation protection — sealed radioactive sources — general requirements and classification" requires a minimum classification of C22212 for calibration sources (or a more restrictive specific classification, depending on the intended use). Source constraints, associated with the desired classification level, can lead to specific developments, and in all cases require testing to obtain this classification.

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ICAM

²⁴¹Am sources for alpha and beta aerosol monitors (ICAM model)

Ball

Source plexiglass ball mounted on stem support

Drawer sources for EDGAR type

Drawer sources are fixed on the monitor and remain permanently in place. In routine operation, the drawer is closed. It is opened when periodic verifications are performed.

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