Re: Irradiation Facilities

[772EAR@delphi.com]

Sue,
What kind of irradiator do you have?  We have a Shepherd Mark I. 
To keep samples cool,  we pack them in dry ice.  The irradiator
has a 6 Ci Cs-137 source.  We do not see any significant melting
of the dry ice during the irradiation, except for normal 
sublimation.  We did some dosimetry on the geometry with the dry ice to calculate how much extra time we would have to 
irradiate the sample due to attenuation by the dry ice.

Hope this helps.
Regards,
Vince Chase
772ear@delphi.com
Radiation Safety Officer
Boehringer Ingelheim Pharmaceuticals
The opinions expressed here are those of the author and do not represent
the opinions policies or practices of Boehringer Ingelheim Pharmaceuticals.