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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 7
Ann. Geophys., 16, 838–846, 1998
© European Geosciences Union 1998
Ann. Geophys., 16, 838–846, 1998
© European Geosciences Union 1998

  31 Jul 1998

31 Jul 1998

The calculation of TV, VT, VV, VV' − rate coefficients for the collisions of the main atmospheric components

A. S. Kirillov A. S. Kirillov
  • Polar Geophysical Institute, Fersman str., 14, Apatity, Murmansk region, 184200, Russia

Abstract. The first-order perturbation approximation is applied to calculate the rate coefficients of vibrational energy transfer in collisions involving vibrationally excited molecules in the absence of non-adiabatic transitions. The factors of molecular attraction, oscillator frequency change, anharmonicity, 3-dimensionality and quasiclassical motion have been taken into account in the approximation. The analytical expressions presented have been normalized on experimental data of VT-relaxation times in N2 and O2 to obtain the steric factors and the extent of repulsive exchange potentials in collisions N2-N2 and O2-O2. The approach was applied to calculate the rate coefficients of vibrational-vibrational energy transfer in the collisions N2-N2, O2-O2 and N2-O2. It is shown that there is good agreement between our calculations and experimental data for all cases of energy transfer considered.

Key words. Ionosphere (Auroral ionosphere; ion chemistry and composition). Atmospheric composition and structure (Aciglow and aurora).

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