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Meaning of ionization chamber

ioniza'tion cham"ber

Pronunciation: [key]
— Physics. Physics.
  1. an apparatus for detecting and analyzing ionizing radiation, consisting of a vessel filled with a gas at normal or lower than normal pressure and fitted with two electrodes such that the current between the electrodes is a function of the amount of ionization of the gas. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.