The experimental data on electron attachment in pure O2and C2H4sngbnd;O2, CO2sngbnd;O2, N2sngbnd;O2, CH4sngbnd;O2, and Hesngbnd;O2mixtures 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 CO2and C2H4data lead to a value for the mean life of O2mdash;*against electron detachment of 1times;10mdash;9sec. The various reactions are discussed in some detail. The number of collisions required to stabilize O2mdash;*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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