I'm trying to convert what would be equivalent to 0.4bq into CPS on the Ludlum 3277/1 with 43-92 scintillator that has an efficiency of 25.5%..
everyone around me is getting differing answers,
the calibration unit has set the alarm to 10CPS but I don't think this is correct? can someone break this down for me?
Source: Pu-239, 4337
Activity: 30972.44 dpm
Meter reading: 7960,7873,7780
count time: 1 min
Distance source to detector: surface
average efficiency 25.5% 4pi
?? would an alarm at 10CPS be equivalent to 0.4Bq?