[ RadSafe ] GM vs ion chamber for dose measurement

[Robert Atkinson]

Hi.
There is one other issue to consider, what exact model and type of GM
probe/meter is being mandated. There are energy compensated GM tubes
(fitted with filters to attenuate the lower energy gammas that cause the
GM tube to over-respond). While some are better than others it is
possible to get an accurate dose response from a properly designed and
calibrated meter with the matching probe. Many use fixed tubes so that a
non compensated tube cannot be used in error.

Robert

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On
Behalf Of Sandy Perle
Sent: 22 March 2007 18:10
To: 'Baumbaugh, Joel SPAWAR'; radsafe at radlab.nl
Subject: RE: [ RadSafe ] GM vs ion chamber for dose measurement

Joel,

I am in 100% agreement with you and your comments. I assume the
"employer"
has their reasons for not simply utilizing an ion chamber (you can reply
privately).

Regards,

Sandy

----------------------------------------------------------------
Sandy Perle 
Senior Vice President, Technical Operations 
Global Dosimetry Solutions, Inc. 
2652 McGaw Avenue
Irvine, CA 92614
 
Tel: (949) 296-2306 / (888) 437-1714 Extension 2306 
Tel: (949) 419-1000 Extension 2306
Fax:(949) 296-1144
 
Global Dosimetry Website: http://www.dosimetry.com/ 
Personal Website: http://sandy-travels.com/ 
 

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On
Behalf
Of Baumbaugh, Joel SPAWAR
Sent: Thursday, March 22, 2007 10:20 AM
To: radsafe at radlab.nl
Subject: [ RadSafe ] GM vs ion chamber for dose measurement


Yes, I know this isn't Friday, but I have a philosophical question for
the group.

So, in conclusion: Am I wrong to be questioning what's going on here? Is
the use of GM's for quantitative/qualitative measurement of gamma/x-ray
dose now an accepted protocol?  

Thanks (ahead of time) for your thoughts.

Joel Baumbaugh



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