Theory of Low-Energy Electron Scattering by Polar Molecules

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Abstract
The total diffusion cross section is calculated for low-energy impact of electrons upon polar molecules in an approximation which treats the molecules as fixed rotators. The amplitude is evaluated and the differential cross section corresponding to fixed orientation of the molecule is then averaged over the Maxwell distribution. It is shown how this simple approach follows from an adiabatic approximation to the excitation amplitudes. The results show excellent agreement with available data.

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