GEIGER-MÜLLER DETECTOR Radiation DetectorsSummaryThe operation of Geiger-Müller detectors are summarized below.G-M Detector SummaryThe voltage of a Geiger-Müller (G-M) detector is set so that any incidentradiation produces the same number of electrons.As long as voltage remains in the G-M region, electron production is independentof operating voltage and the initial number of electrons produced by the incidentradiation.The operation voltage causes a large number of ionizations to occur near thecentral electrode as the electrons approach.The large number of positive ions form a positive ion sheath which preventsadditional electrons from reaching the electrode.A quenching gas is used in order to prevent a secondary pulse due to ionizationby the positive ions.IC-06 Page 44 Rev. 0
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