Use of Argon in the Ionization Method of Measuring Cosmic Rays and Gamma-Rays

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Abstract
The saturation-voltage, current characteristics of argon were studied at two pressures of argon and at four widely different ionization intensities produced by gamma-rays. Pressure-ionization curves for argon and for air were made. A comparison of the argon curve with the nitrogen one shows that argon is about twice as sensitive for use in ionization chambers for studying gamma-rays and cosmic rays. Some transient ionization effects are described. A comparison of the intensity of cosmic rays to gamma-rays was made and this ratio was found to be lower for argon than for air in the ionization chamber at the same pressure.