Calculation of electron impact inelastic cross sections and rate coefficients for diatomic molecules. Application to air molecules.

Physics

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Molecular Processes: Molecular Oxygen, Molecular Processes: Molecular Nitrogen, Molecular Processes: Nitric Oxide, Molecular Processes: Earth Atmosphere

Scientific paper

A method based upon the modified weighted total cross section (WTCS) theory for the determination of electron impact excitation, ionization and dissociation cross sections and rate coefficients is proposed. An application to the main electronic states of diatomic molecules of the air (O2, N2 and NO) and the corresponding ions (O2+, N2+ and NO+) is given. The reaction rate coefficients were calculated using one and two kinetic temperatures (θe and θg for electrons and heavy particles, respectively) and were fitted in the Arrhenius form in the range 1500-15,000 K. This method can be easily extended to any diatomic molecule.

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