Non-adiabatic effects in low-energy electron-molecule scattering

In this talk, I will show how the complex Kohn method which has been successfully applied to electronically elastic and inelastic electron scattering by both diatomic and polyatomic targets, can be modified to provide a computational tool for variational evaluation of the off- shell T-matrix in a completely general ab initio context. In the following section, I will give a brief outline of the theory. I will then illustrate the method by showing results we have recently obtained for vibrational excitation of both H2 and CH4 by low-energy electron impact