QA/QC for NaI Gamma Spec

[tjpaul@ucla.edu (Tim Paul)]

Hello Radsafers,

A question about dead time.

We're in the process of updating our QA/QC procedures for our NaI based
counting system.  Currently we do the following things:

Isotope calibration            ~Annually
Background                      Day of Use
Constancy                       Day of Use
Photo-Peak positions            Day of Use

Recently, we've had a suggestion to monitor dead-time and state actions to
be taken if dead time is too high.  The trouble is, I'm not sure where to
set the action level, or even a good way to determine this action level.

Any help you could provide in this area would be appreciated.

Sincerely,

Tim Paul, CHP
UCLA Radiation Safety
1010 Veteran Ave
2195 WMB,  Box 951765
Los Angeles, CA  90095-1765
(310) 794-7365
e-mail:  tjpaul@ucla.edu