Current collection and ionic recombination in small cylindrical ionization chambers exposed to pulsed radiation

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Abstract
The recombination correction for a small cylindrical ionization chamber exposed to pulsed radiation was re-examined. A simple 2-voltage testing technique was described and demonstrated. The existing theory for an air-filled chamber (Boag) was accurate over the range of charge densities examined (0.013 .rho.[initial charge density of pulse-created positive or negative ions]/pulse to 3.8 .rho./pulse) where .rho. = 3.33/104 C per m3 (1 esu[electrostatic unit]/cm3).