Abstract
The analysis of experimental data indicates that the N2B2zJ state is excited in an electron beam due to the collisions of primary and fast secondary electrons with molecules in the N2XTE+ state. Excitation by fast secondary electrons in the beam halo follows Ak selection rules different from those for primary electrons, which causes redistribution of the intensity lines in the spectrum of the first negative system (fns) when measurements are performed in a gas flow. In static conditions besides the above mechanism, other mechanisms associated with the effect of different products of the gas-electron interaction take place. On the basis of a linear integral Boltzmann equation, a theoretical model has been constructed to find a distribution function of fast secondary electrons. The comparison between the calculated contribution of secondary electrons to the fns radiation intensity and experiments shows good agreement. It is shown that the effect of secondary electrons on the intensity redistribution of spectrum rotational lines is insignificant
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