Relationship between electron-scattering grand total and ionization total cross sections

Abstract

Regression formula which relates grand total cross section and ionization total cross section for electron scattering from simple hydrocarbons and from perfluorinated molecules has been proposed. This formula was then used to evaluate the ionization total cross sections for WF 6 and for structured isomers of C 3H 4 and C 4H 6, at intermediate electron-impact energies. For WF 6 the estimated ionization cross section is compared with available experimental and theoretical data. In addition, for C 3H 4 and C 4H 6 ionization total cross sections were calculated with the binary-encounter Bethe (BEB) model to compare with the values predicted from the regression formula. Grand total cross section for electron scattering from UF 6 molecules was also estimated over energy range from 20 to 400 eV.