[ RadSafe ] Gas Proportional Dectector - Mass Correction Sets

[Wesley]

Christopher and Radsafe,

I am replying to all of Radsafe because I suspect others can learn from my
question (and your answer), not just me.

I am confused as to just what you are correcting for with planchets
containing Tc-99, each of different mass. Could you do the same with a
single Tc-99 source and a set of absorbers to place on top of the source?
Also, I would imagine the material (metal, plastic, etc.) and its density
would be critical to your purpose.

I wish you could describe the process and goal a bit for us.

Thanks.
Best regards, Wes
Wesley R. Van Pelt, PhD, CIH, CHP
Wesley R. Van Pelt Associates, Inc.
 

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On Behalf
Of Christopher W. Becker
Sent: Tuesday, February 06, 2007 7:31 PM
To: 'RADSAFE'
Subject: [ RadSafe ] Gas Proportional Dectector - Mass Correction Sets

All,

This is for those in the United States.  I am looking for a set of Tc-99
planchets to establish the mass correction curve for a gas flow proportional
counter.  Each should have an activity of approximately the same (say 500
Bq) with linearly increasing mass.

Thanks in advance.
Respectfully,
Christopher W. Becker