The calculation of TV, VT, VV, 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 involving vibrationally excited molecules in the absence of non-adiabatic transitions. The factors of molecular attraction, oscillator frequency change, anharmoni...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
1998-07-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/16/838/1998/angeo-16-838-1998.pdf |
| Summary: | 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 N<sub>2</sub>
and O<sub>2</sub> to obtain the steric factors and the extent of repulsive
exchange potentials in collisions N<sub>2</sub>-N<sub>2</sub> and O<sub>2</sub>-O<sub>2</sub>.
The approach was applied to calculate the rate coefficients of
vibrational-vibrational energy transfer in the collisions N<sub>2</sub>-N<sub>2</sub>,
O<sub>2</sub>-O<sub>2</sub> and N<sub>2</sub>-O<sub>2</sub>. It is shown that
there is good agreement between our calculations and experimental data for all
cases of energy transfer considered.<br><br><b>Key words.</b> Ionosphere (Auroral ionosphere; ion
chemistry and composition). Atmospheric composition and structure (Aciglow and
aurora).</p> |
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| ISSN: | 0992-7689 1432-0576 |