Re: Gamma Level for Cs-137

[Brian_Gaulke@hc-sc.gc.ca]

Brian Gaulke
02/17/99 02:51 PM

What is the geometry of your source?  Have you corrected for decay?

MicroShield V4.0 gives 0.32 R/hr at 1 m from 1 Ci, but this is a bare,
point source.

Brian R. Gaulke, CHP
Head, Dosimetry Section
Radiation Protection Bureau
Health Canada
(613) 941-0143
Brian_Gaulke@hc-sc.gc.ca





don.mercado @ lmco.com on 99-02-17 02:11:53 PM

Please respond to radsafe@romulus.ehs.uiuc.edu

To:   radsafe @ romulus.ehs.uiuc.edu
cc:    (bcc: Brian Gaulke)
Subject:  Gamma Level for Cs-137






> Greetings,
>
> Do any of you have another gamma level for Cs-137 other than the 0.33
R/hr
> at 1m/Ci as stated in the Rad Health Handbook? I'm having trouble
> calibrating my pocket dosimeters and having them come in within spec. We
> use TLDs to check what exposure the dosimeters are getting, and they
agree
> with the chamber readings. Unfortunately, they all are about 30% below
> what I've calculated they should be getting using the above number.
>
> Any help would be appreciated. Thank you in advance.
>
> Donald P. Mercado
> Radiation Safety Officer
> Lockheed Martin Missiles & Space
> O/47-20, B/101
> 1111 Lockheed Martin Way
> Sunnyvale, CA 94089
> Ph. (408) 742-0759
> Fax (408) 742-0611
> Email: Don.mercado@lmco.com
>
>
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