Sectors of activity

• alpha and multialpha ray sources
• beta sources
• gamma sources
• X-ray sources
• Reference wide area sources for radiation protection

 Reference wide area sources for radiation protection

Reference (alpha and beta) wide area sources for calibration of surface contamination monitors.
These wide area sources, specially designed for calibration of contamination detectors used for radiation protection purposes, are characterized in terms of the emerging flux of alpha or beta particles, expressed in s^-1, within a solid angle of 2 pi sr.

• Sources with aluminium substrate

At the same time, LEA has perfected a technique for applying an active deposit on an aluminum substrate in accordance with the same standard (NF ISO 8769) :

• Category 2 reference sources, and working sources.
• No contamination on contact.
• Uniformity of deposit.
• Reference sources calibrated in terms of surface emission flux within 2 pi sr to ± 6%.
• Activity calculed to ± 10%.
• Efficiency of around 50%, depending on the deposited radionuclide.

These sources are certified as reference sources for calibration of surface contamination monitors.
They are COFRAC-certified, and linked to CEA/DIMRI/LNHB category 1 standards :

• reference and ID number of source,
• radionuclide and half-life,
• source category,
• active area of source,
• surface emission flux, uncertainty and reference date,
• activity calculated at reference date,
• uniformity.

LEA also produces, on request, deposits on blotting paper placed in type I or J trays, or “sandwiched” within a plastic film.

Download product references 
For a custom source request, contact LEA.

Radionuclides

• Barium 137m (¹³⁷Ba^m)
• Carbon 14 (¹⁴C)
• Cesium 137 (¹³⁷Cs)
• Chlorine 36 (³⁶Cl)
• Cobalt 60 (⁶⁰Co)
• Plutonium 239 (²³⁹Pu)
• Promethium 147 (¹⁴⁷Pm)
• Strontium 90 (⁹⁰Sr)