https://doi.org/10.1007/s100530050196
Reaction and inelastic processes in the collision O2 (v >> 0) + O2 (v = 0)
1
Instituto de Matemáticas y Física Fundamental
(C.S.I.C.),
Serrano 123, 28006-Madrid, Spain
2
Centro de Estudios e Investigaciones, Universidad Nacional de Quilmes,
R. Saenz Peña 180, 1876 Bernal, Argentina
3
Facultad de Ciencias,Universidad Autónoma del Estado de Morelos,
62210 Cuernavaca, Morelos, Mexico
Corresponding author: a jcm@fresno.csic.es
Received:
3
February
1998
Revised:
27
March
1998
Accepted:
15
May
1998
Published online: 15 November 1998
A reduced dimensionality model is used to study the reaction O
O
O
O
by means of
time-dependent and time-independent quantum-mechanical methods.
State-selected probabilities and rate constants 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 important for relatively high
translational energies and therefore the calculated rates are too small
at the temperatures of interest. It is concluded, however, that the
reaction saddle point region in the potential energy surface plays a
crucial role in the enhancement of vibrational relaxation.
PACS: 34.10.+x – General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.) / 34.50.Ez – Rotational and vibrational energy transfer / 82.40.We – Atmospheric chemistry
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998
