Energy-dependent vibrational frame transformation for electron–molecule scattering with simplified models

A recent extension of the vibrational frame transformation method to allow for energy dependence of its parameters is explored through applications to model systems. Assuming the Born–Oppenheimer approximation when the incident electron moves inside the target, this method accounts for the energy dependence of body-frame scattering information by defining potential curves of the electron–molecule compound which depend on an eigenphase parameter. Escape of the scattered electron to large distances is treated by quantum defect methods. Calculations for some simple models show many realistic aspects encountered in electron–molecule scattering.