Total Cross Sections for Electron Scattering from the Isoelectronic(Z = 14) Molecules (C2H2, CO, HCN and N2) at100–5000 eV

Abstract

A complex optical model potential correlated by the concept of bondedatom, which considers the overlapping effect of electron clouds betweenthe two atoms in a molecule, is employed to calculate the total crosssections for electron scattering from the isoelectronic (Z = 14)molecules (C2H2, CO, HCN, andN2) at 100–5000 eV using the additivity rule at the Hartree–Focklevel. The difference between the bonded atom and the free one is thatthe overlapping effect of electron clouds of bonded atoms in moleculesis considered. The quantitative molecular total cross section resultsare compared with the experimental data and with other calculations available and good agreement is obtained above 100 eV. It isshown that the additivity rule along with the complex optical modelpotential considering the overlapping effect of electron clouds cangive results better than when uncorrelated by it. The correlatingcalculations are much closer to the experiments than thespherical-complex-optical-potential results in the lower energy region[Phys. Rev. A 45 (1992) 202]. Therefore, considering the overlappingeffect of electron clouds in the complex optical potential could behelpful for the better accuracy of the total cross section calculationsof electron scattering from molecules.