Electron-methyl halides scattering. Total cross section measurements for methyl chloride and methyl fluoride

Abstract

Electron transmission experiments have been carried out in CH₃F and CH₃Cl in the energy range between 0.3 and 250 eV. Absolute values for total cross sections are presented and compared with the available data of other groups. The present cross sections are found to be in good agreement with other experiments for CH₃F in the overlapping range of energies but deviate significantly from prior results in the case of CH₃Cl. Our present measurements, together with previous ones for CH₃Br and CH₃I, confirm the correlation between static electric dipole polarizability of investigated targets and total cross sections at intermediate energies.