Re: S-35 in urine, liq. scnit sample

["Dale E. Boyce" <dale@radpro.uchicago.edu>]

One thing that we used to do on our older LSC's when we suspected
luminescence was to crank the LLD up until we cut the tritium
efficiency by a quarter to a half.  This excluded all of the 
luminescence, but kept decent efficiency for all of the
radioisotopes.  We now have a machine with spectral capabilities
and luminescence detection via monitoring the singles rates in
each photomultiplier.  We know from the singles random coincidence
 monitoring when we need to look at a spectrum to determine
if there is any activity in the sample.

Dale