CLASSICAL DYNAMICS OF THE N(S-4)-))-]NO(X(2)PI)+O(P-3) REACTION(O2(X(3)SIGMA(G)()

Classical trajectory calculations have been performed to determine the reaction rate constants and NO final vibrational-rotational distribut ions of the N(4S) + O2 reaction at hyperthermal translational energies . The reaction occurs on two electronic potential energy surfaces, bot h of which must be considered for a realistic description of the N(4S) + O2 dynamics. The calculations, which are in good agreement with the available experimental data, show that the reaction has a very strong translational energy dependence and produces NO with extensive vibrat ional and rotational excitation. The present study provides the N(4S) + O2 reaction attributes necessary to predict NO formation and emissio n from translationally hot N(4S) in the thermosphere.