The dissociative recombination of vibrationally excited N2/+/ ions

Physics

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Nitrogen Ions, Photodissociation, Quantum Numbers, Recombination Coefficient, Upper Atmosphere, Vibrational Spectra, Atmospheric Models, Laser Induced Fluorescence, Laser Spectroscopy, Molecular Excitation, Molecular Rotation, Photoluminescence, Plasma Diagnostics

Scientific paper

The dissociative recombination coefficient of N2(+) is determined as a function of the internal vibrational quantum number of the X 2 Sigma g + ground state in an attempt to explain the unexpectedly low values of N2(+) measured in the normal and auroral ionospheres. Laser-induced fluorescence techniques were used to study the behavior of N2(+) ions in specifically identified vibrational and rotational quantum state during discharge and afterglow periods. The dissociative recombination coefficients for the three lowest vibrational levels are found to increase slowly with vibrational level. An expression for the dependence of the dissociative recombination coefficient on electron and vibrational temperature is also obtained.

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