High count with LSCh

[HALEEM MAHMOUD SAID <mshaleem@dpc.kfupm.edu.sa>]

Hello safety netters

I have this question regarding high count rate with the liquid 
scintillation counter.  Whenever a sample of oil vacuum pump of 
anccelerator is counted I get high count rate with initial count.
However, when the sample is counted again latter on, the response is 
numerical value, and the value keep decreasing when counted repeatedly 
over time until stalbilizes latter on like 24 hours latter.  The same 
thing occurred when counting saliva samples.  I was wondering if any of 
you could give an explanation for this situation either from past 
experience or an educated guess.  Your help is very much appreciated.
Thanks.


Mahmoud Haleem
KFUPM
P.O.Box 1061
Dhahran 31261
Saudi Arabia
mshaleem@dpc.kfupm.edu.sa