PAA CoincidenceCounting

ADC non-linearity

Canberra Model 9615 < 0.04% (integral) over 2usec

Canberra Model 9633 < 0.025% (integral) < 0.9% (differential)

CAEN V792 < 0.1% (integral)

Coinc Scope pictures

First pict with ADC gate

Two HpGe detectors were used to detect coincidence gammas from Co-60 on 6/14/2013.

Co-60 will beta decay to Ni-60 giving off two gammas in coincidence having energies of 1173 and 1332.5 keV. The scope pictures below record the pulses from the HpGe detector that are in coincidence. I would have expected the charge output by the HpGe detector to be similar for the two gammas, but there are some that have less than half the charge. The could be the beta particles from the decay reaching one of the detectors in coincidence with one of the gammas.

TF_CPAA_Log

TF_CPAA_Patents

PAA_Research