Re: Air Sampling

[Robert Leib <leib@ncweb.com>]

It may help if you mention what isotopes are involved.

Robert M. Leib, CHP
leib@ncweb.com

Knapp, Timothy M. wrote:

> Radsafers
>
> We have air sampling systems with charcoal filters in series used to
> determine the trapping efficiency of the systems.  Over the past year I have
> run into 3 occasions where the counts in the second filter are almost equal
> to those of the first.  We're only talking a few thousand counts so I have
> ruled out saturation by the nuclide.  Nothing new was done procedurally and
> as far as I can tell the temperature and humidity were the same as well.  Is
> there a phenomena called tunneling that occurs in charcoal ?  If so can
> someone explain or provide a reference?  If not can someone explain or
> provide a reference?
>
> Without an explanation or a reference
> Tim K.
>
> |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
> Timothy M. Knapp
> Merck Research Laboratories
> PO Box 4, WP44C-2
> West Point, PA 19486
>
> Ph (215) 652-4648
> Fx  (215) 652-3667
> timothy_knapp@merck.com
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