CALCULATION OF LOW-ENERGY ELASTIC CROSS-SECTIONS FOR ELECTRON-CF4 SCATTERING

A new computational approach has been used to evaluate the rotationall y summed, vibronically elastic integral cross sections from the scatte ring of slow electrons (energy ranging from 1.0 eV up to 40.0 eV) by t etrafluoromethane molecules in the gas phase. The various symmetry com ponents have been analyzed using the exact static exchange approximati on and also by including a nonempirical, model polarization potential employed before by our group. A comparison with earlier calculations a nd with existing experiments allows us to assign the symmetries of the shape resonances in the 5-30 eV energy region which are seen by exper iments and are also shown by the present calculations.