THE CALCULATION OF TV-RATE, VT-RATE, VV-RATE, VV'-RATE COEFFICIENTS FOR THE COLLISIONS OF THE MAIN ATMOSPHERIC COMPONENTS

The first-order perturbation approximation is applied to calculate the rate coefficients of vibrational energy transfer in collisions involv ing vibrationally excited molecules in the absence of non-adiabatic tr ansitions. The factors of molecular attraction, oscillator frequency c hange, anharmonicity, 3-dimensionality and quasiclassical motion have been taken into account in the approximation. The analytical expressio ns presented have been normalized on experimental data of VT-relaxatio n times in N-2 and O-2 to obtain the steric factors and the extent of repulsive exchange potentials in collisions N-2-N-2 and O-2-O-2. The a pproach was applied to calculate the rate coefficients of vibrational- vibrational energy transfer in the collisions N-2-N-2, O-2-O-2 and N-2 -O-2. It is shown that there is good agreement between our calculation s and experimental data for all cases of energy transfer considered.