RE: Environmental TLDs

["Sandy Perle" <sandyfl@earthlink.net>]

> Don't plastic laminators use heat to fuse the plastic together around the
> item being laminated? And aren't TLDs pretty sensitive to that type of
> heat?  Is it possible you introduced a heat-induced artifact into your
> eventual radiation readings from the TLDs?  

Since most phosphors, be they LiF, CaF, LiBO or CaSO, require 
approximately 300 degrees C to adequately heat and mitigate any 
potential residual, there is little chance of damaging the chip. Pre-
heating a TLD generally begins at 150 degrees C. Since the 
process Dave was referring to consists of unirradiated TLDs, there 
is no issue of damage, or, a pre-irradiation annealing issue.

------------------
Sandy Perle
Technical Director
ICN Dosimetry Division
ICN Plaza
3300 Hyland Avenue
Costa Mesa, CA 92626
Office: (800) 548-5100 x2306 
Fax:    (714) 668-3149
  
sandyfl@earthlink.net
sperle@icnpharm.com

ICN Dosimetry Website:
http://www.dosimetry.com

Personal Website:
http://www.geocities.com/CapeCanaveral/1205

"The object of opening the mind, as of opening 
the mouth, is to close it again on something solid"
              - G. K. Chesterton -

The opinions expressed are solely, absolutely, positively, definitely those of the author, and NOT my employer
************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html