P-32 LSC efficiency

["William A. Fendt" <35346@UDel.Edu>]

Will someone confirm my thinking on this... or tell me where I'm wrong?	

A known amount of P-32 is counted in 5ml of counting cocktail in a 
Beckman liquid scintillation counter with channels wipe open.  There is 
no chemi or photo luminesence.  A P-32 counting efficiency of about 150% 
is shown.

The efficiency exceeds 100% because Chenenkov effect contributes to the 
counter cpm.  Right ....?  In what counting region might one find the 
Cherenkov radiation appear?  ... H-3 region?, ... C-14 region?

Thanks for the help,  Bill Fendt, 35346@udel.edu