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Dictionary

Gei'ger count"er

an instrument for detecting ionizing radiations, consisting of a gas-filled tube in which electric-current pulses are produced when the gas is ionized by radiation, and of a device to register these pulses: used chiefly to measure radioactivity. Also called Gei'ger-Mül'ler count"er.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

Geiger

Geiger-Müller threshold

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