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Re: Follow-up on Monitoring of Floro/Cine

To: radsafe@romulus.ehs.uiuc.edu
Subject: Re: Follow-up on Monitoring of Floro/Cine
From: David Scherer <scherer@uiuc.edu>
Date: Tue, 12 Nov 1996 12:15:34 -0600
Cc: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>

At 11:28 AM 11/12/96 -0600, William Lorenzen wrote:
>Thanks for all the responces...  To follow-up.  Is there a concern for the 
>"back-scatter" off the lead aprons and a possibility for over stating the
actual 
>reading on badges placed on the collor.
>
At 100 keV, the photoelectric cross section is more than an order of
magnidude larger than the Compton scattering cross section, so backscatter
is small.  The cross sections are equal at about 500 keV.

Regatds,
Dave Scherer\scherer@uiuc.edu

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