Re: Old military Check sources.

[rkathren@tricity.wsu.edu (ron kathren)]

Peter --

I think you are right.  The early 27 series did use the Ra-226 wand, and it
was as a plastic (lucite) wand with the hot end painted magenta.

I believe the Kr-85 were in fact metal.

Ron Kathren

>{Original Msg: 'Old check sources' from <radsafe@romulus.ehs.uiuc.edu>
>{
>{Anyone know the identity of the radionuclide associated with an old 
>{"pencil" check source MX-1083/PDR-27 ?   Thx,   jimg@unm.edu
> 
> 
>The rod check sources on the AN/PDR 27 series military GM units were
>Ra-226 until about the early 70s when Kr-85 ones were indroduced to
>replace the Ra-226 ones.  If the unit was produced in the last 15 years
>then you almost certainly have the Kr-85.  If it's old, depending on the
>history [if it was in the military and got a replacement Kr-85 rod]
>you may or may not have a Ra-226 one.  The meters were made by Eberline
>I think, they might have insight on a way to tell them apart.  I seem
>to remember the Ra-226 might have been plastic and the Kr-85 metal [Al]
>but I am not sure.  But I think those are your choices.
> 
>Peter G. Vernig, VA Medical Center vernig.peter@forum.va.gov
> 
> 
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