Generalised quantum defect theory for electron scattering by polar molecules

Abstract

By the use of effective-range theory electron scattering by polar molecules in the fixed-nuclei approximation is considered. The relationship between the scattering data and the electron affinity of the polar molecule is obtained. It is shown that three ² Sigma ⁺ states of the ions LiF^- and BeO^- exist. Differential and integrated cross sections for electron scattering by LiF and BeO are calculated. The relationship between the data for scattering by HCN and the electron affinity of HCN is considered. The electron affinities of HF and H₂O, calculated in the fixed-nuclei approximation, are used to obtain the scattering cross sections.