Re: TLDs - False Positive Betas

["Ron L. Kathren" <rkathren@beta.tricity.wsu.edu>]

Steve:

TLD's do respond to beta, but the response is a function of the geometry 
(ie thickness) of the TLD relative to the beta energy, and the overlying 
filter or material.  Much work has been done in this area by PNL and I 
believe that beta calibrations are addressed in the ISO standard.  The 
TLD beta response is well known, and beta-IER dosimeters are used at some 
of the national labs.  There are many published articles -- you might 
want to try QUEST, and look at Chapter 5 in Vol 2 of Kase and Bjarngard, 
or at an ancient paper by Kocher et al (Health Phys 18:311, 1970) which 
gives a tabulation of the response of the Hanford dosimeter to betas of 
various energies.

Ron Kathren

On Wed, 19 Jul 1995, Stuart Torf wrote:

> Has anyone experienced "false positive" beta responses with 
> their TLDs? We  have performed glow curve analyses on these 
> responses which say that there is a real beta response but 
> our TLD users say that there is no beta. Any comments?  
> 
> Thanx
> 
> Stu Torf
> torfsm@nu.com
> RP section
> Northeast Utilities
> 203-665-5814
> 
> P.S - whatever the standard disclaimers are, they apply.
> 
> 
> 
>