Definitions for "Geiger counter"
instrument for measuring the intensity of radiation.
An instrument used to detect, measure and record nuclear emanations, cosmic rays and artificially produced subatomic particles.
An instrument, consisting of a gas-filled tube containing electrodes between which an electric voltage is maintained, used to detect ionizing radiation. When radiation passes through the tube, short pulses of current are generated, which are measured and related to the intensity of the radiation.