Carbon Dioxide Filled Geiger-Müller Counters

Abstract

Efficient detection of the long period carbon isotope, C14, can be achieved when this isotope is oxidized to CO2 gas which may then be used as a Geiger-Müller counter filling. The special problems which arise in CO2 counters are discussed. Carbon dioxide ions produce undesirable effects which are eliminated by small amounts of CS2. The result of the investigation has been to develop a CO2–CS2 counter which has satisfactory properties for routine studies of C14.