Re: Finger rings and P-32

[coogen_michael@hq2ccgw.hq.dla.mil]

Bruce:  Your questions on the efficiency of the finger ring and the minimum 
detectable dose can be answered by the organization that processes your TLDs.  
As for as NAVLAP certification, that would depend upon what areas did the TLD 
processer qualified.  There are several areas to NAVLAP certification.  I 
believe that if you process TLD for extremity exposures, you must be certified 
in that area.  I would get in touch with LES Slazback.  As for as PIs receiving 
greater that 10 percent of limits using P-32, I would say that the potential is 
there, but frequency is rare.  I have quite a few PI using P-32 and the doses 
received by these individuals were insignificant over the 4 years that I 
performed medical research..mike coogen sends


______________________________ Reply Separator _________________________________
Subject: Finger rings and P-32
Author:  radsafe@romulus.ehs.uiuc.edu at hq2ccgw
Date:    8/15/95 6:40 PM



Hi All,

I was just wondering, what is the efficiency of a (single element?) 
finger ring for P-32 beta dosimetry?  What is the Min Dose measurable?

Also, the 10% limit for badging (10CFR20.1502) would be 5 rem/yr (skin and 
extremities), 500 mrem/yr(whole body). Has anyone on radsafe had a PI or 
worker get that much from using P-32 in a lab?

As a note, I noticed that processors are not required to have NAVLAP 
certification for 
extremity monitoring (10CFR 20.1501.c). 

P-32 (roughly) has 1.7 MeV beta (E max), 0.69 MeV (E ave)

-Bruce Busby