I-125 Calib. Standard for Charcoal Cartridge?

[vanpelt@ios.com]

Hi All,

I am looking for a calibration standard containing I-125 or I-129 in the 

form of a charcoal air sampling cartridge (the type which is the size of a 

hockey puck.)

The reason is obvious: I wish to be able to analyze for the quantity of 

I-125 on air sampling cartridges by counting them directly on a radiation 

detector such as a thin NaI crystal scintillation detector.  By having a 

NIST tracable calibration standard in the same geometry as the sample, 

determining counting efficiency is very easy.

Thanks in advance.

Wes.

Wes Van Pelt                                  Radiation Safety
vanpelt@ios.com                    Environmental Radioactivity
Team OS/2                                                KF2LG