Single ionization of H2O and C4H8O by electron impact: Single-center description of the final state

Abstract

In this work, we report triple differential cross sections for the single ionization of H2O and C4H8O by electron-impact at intermediate to low impact energies, calculated within the framework of the CDW-EIS model considering two different approximations to the continuum electrons’ interaction with the molecular ion in the final state. These calculations are benchmarked with recently reported experimental data and two state-of-the-art theoretical models. Present results suggest that a spherical average of the anisotropic potential associated to the residual ion improves the description of these collision processes for electron emission into the scattering and perpendicular planes, with respect to approximating it as a single center of charge +1, whereas full-perpendicular emission is best described by this simpler approximation.