Abstract
The
γ-ray detection threshold temperatures of superheated drops of refrigerant liquid R-12 is presented here for the three γ-ray energies 59.54
keV (
241Am, 500
mCi), 662
keV (
137Cs, 32.5
mCi) and 1250
keV (
60Co, 0.45
mCi). Nucleation was detected with an active device by counting the number of drops vaporized per minute as a function of the temperature of the detector over a wide range. The results show that the threshold temperature for detection increases with the energy of the incident photons.
