Total and elastic cross sections for methyl halides by electron impact

The efficient calculation of electron impact ionization cross sections with effective core potentials

“…Experimental values by Rejoub et al56 are shown as squares. Theoretical calculations by Naghma and Antony,74 who used a complex scattering potential to calculate the total ionization cross section, are shown by the brown line. The solid lines of αBEB, ECP BEB, and AE BEB are this work.…”

Low-energy elastic electron scattering from chloromethane, CH3Cl

“…Given the close agreement between the underlying DCSs (figure 2), this disagreement appears to represent differences in extrapolation and integration procedure. The theoretical ICS of Naghma and Antony [7] appears to fall off too steeply with energy.…”

“…Recent measurements of the electron total scattering cross section for CH 3 Cl include those of Benitez et al [1] from ∼0.3 to 7.5 eV, Wan et al [2] from 0.2 to 12 eV, Krzysztofowicz and Szmytkowski [3] from 0.25 to 250 eV, Karwasz et al [4] from 75 to 2000 eV, Kimura et al [5] from 0.8 to 600 eV, and Jones et al [6] from 0.02 to 9.5 eV. Theoretical values for the total scattering cross section derived from simple models of the electron-molecule collision process have also been reported [4,7].…”

“…Gallup and Fabrikant [19] used a version of R-matrix theory to evaluate vibrationally resolved elastic DCSs for very low energies (0.5 eV and below). Kato et al [30] reported values of the elastic DCS and ICS above 30 eV obtained from a simplified model, while Naghma and Antony [7] applied a similar model to obtain the ICS at 20 eV and above.…”