Design of a proportional counter for gamma-rays.
D005720:Gamma Rays; D006801:Humans; D009946:Organothiophosphorus Compounds; D011874:Radiometry; D011883:Radium
D009946:Organothiophosphorus Compounds; C012568:terbufos; D011883:Radium
COUNTERS; RADIATIONS/counters; RADIUM