LXXIV. Columnar recombination in nitrogen

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Abstract
Under normal conditions of use, pulse ionization chambers function by virtue of the collection of free electrons liberated by the incident radiation. It is sometimes found, especially under conditions of high gas pressure, that the recorded pulse is smaller than the initial ionic burst and this loss of pulse height is generally attributed to capture of electrons by electronegative impurities in the gas resulting in the formation of negative ions which, owing to their much smaller mobility, are not collected within the short collection times used.

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