J. Camposmartinez et al., REACTION AND INELASTIC PROCESSES IN THE COLLISION O-2(V-MUCH-GREATER-THAN-0)-2 (V=0)(O), The European Physical Journal. D: Atomic, molecular and optical physics, 4(2), 1998, pp. 159-168
A reduced dimensionality model is used to study the reaction O-2(X(3)S
igma(g)(-), v much greater than 0)+O-2((3)Sigma(g)(-), v' = 0) --> O-3
(X(1)A(1))+ O(P-3) by means of time-dependent and time-independent qua
ntum-mechanical methods. State-selected probabilities and rate constan
ts are obtained for the reactive process as well as for the inelastic
collision in which the vibrationally excited oxygen loses one or more
quanta. It is found that the experimentally observed jump in depletion
rates above a critical value of v could be partially explained by the
vibrational relaxation rather than reaction. Reaction only becomes im
portant for relatively high translational energies and therefore the c
alculated rates are too small at the temperatures of interest. It is c
oncluded, however, that the reaction saddle point region in the potent
ial energy surface plays a crucial role in the enhancement of vibratio
nal relaxation.