Radiation-Induced Reactions in the N 2 -O 2 -H 2 O System

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Abstract
The exposure of moist nitrogen-oxygen mixtures to electron bombardment lead directly to the formation of nitric acid and nitrous oxide. After complete exhaustion of the water, the nitric acid disappeared with the formation of water and a stoichiometric amount of nitrogen dioxide. Subsequent to decomposition of the nitric acid, nitrogen dioxide was produced at a much lower rate, and the total nitrogen fixation yield was decreased. Production and destruction of nitric acid were linear functions of the energy input, as was the formation of nitrogen dioxide from nitric acid. There was a marked dependence of the G values for all these chemical changes on the oxygen concentration, with maximum values reached in every case at about 15 mole % oxygen.

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