[ RadSafe ] FW: OSL/TLD Comparison Experience

[Brennan, Mike (DOH)]

Hi, Dan.

This isn't my area of expertise, but I love a tech puzzle.  First, a
couple of the obvious questions:

1)  Is something new?  Have you just started using OSL badges, or have
you changed vender and/or crystal for your TLDs?

2)  Have you compared the energy spectra of the isotopes in the
different departments with the energy sensitivity of the OSL and TLD
systems?  

3)  With the environmental TLD programs I am familiar with, you can see
a seasonal variation due to more electrons escaping the traps in the
heat of the summer than in the cold of the winter.  Is the work and/or
badge storage environment noticeably hotter (thermally, not
radiologically) in the departments where the TLDs read low? 

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Hoffman,
Daniel E
Sent: Friday, April 23, 2010 6:21 AM
To: radsafe at health.phys.iit.edu
Subject: [ RadSafe ] FW: OSL/TLD Comparison Experience

Hi All.  I just realized that I misstated the facts in my original post.
What I meant to say was that the OSL results have been higher (not
lower) than the TLD results in some departments.  Sorry about the
miscommunication.

Dan

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Hoffman,
Daniel E
Sent: Thursday, April 22, 2010 12:39 PM
To: radsafe at health.phys.iit.edu
Subject: [ RadSafe ] OSL/TLD Comparison Experience

Hello RadSafers.  Our plant (nuclear medicine production involving both
reactor- and accelerator-produced isotopes) is seeing significantly
lower results using OSL badges vs. TLD badges, but only in some
departments.  For other departments the results are virtually the same.
Has anyone else had similar experiences at their facilities?

I know the 'dosimetry bunch' will enjoy kicking this one around.

Please feel free to contact me offline if you prefer.

Thanks. 

Dan Hoffman

Daniel E. Hoffman, CHP, CSP
Radiation Safety Officer
Covidien
2703 Wagner Place
Maryland Heights, MO 63043
314-654-7906 (office)
314-625-1881 (cell)

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