Attachment of Low-Energy Electrons to Oxygen

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Abstract
The experimental data on electron attachment in pure O2 and C2H4–O2, CO2–O2, N2–O2, CH4–O2, and He–O2 mixtures are reviewed. The results have been interpreted by a mechanism which is a modification of the Hurst and Bortner extension of the Bloch and Bradbury mechanism. The rate constants in the general rate equation are estimated and the equation is shown to be in general agreement with the reaction orders which have been obtained. The CO2 and C2H4 data lead to a value for the mean life of O2—* against electron detachment of 1×10—9 sec. The various reactions are discussed in some detail. The number of collisions required to stabilize O2—* has been estimated from the experimental data and compared with the theoretical estimate of the rate of vibrational deactivation for each of the molecules studied.

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