A study of a gas scintillation multiwire proportional counter

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Abstract
A gas scintillation proportional chamber has been built to investigate its behaviour as a high-intensity low-energy X-ray detector using a gas mixture of argon and nitrogen. An X-ray source (55Fe) and an alpha -particle source (241Am) have been used to test the chamber. The scintillation pulse height has been studied for several anode voltages and for various concentrations of nitrogen. The maximum scintillation light output has been obtained for a nitrogen concentration of 2%. The energy resolution of 32.5% has been obtained using 5.9 keV X-rays for a gas multiplication factor of about 400. Very little change in the characteristics of the chamber have been observed up to rates of about 106 per second.