Modelling low energy laser assisted free-free scattering*

Free-free scattering, particularly when it involves electrons with incident energies below the ionization potential of the target atom, can be a significant contributor to the opacity of a medium. Here we present calculations and Monte Carlo simulations of laser assisted free-free scattering for incident energies from 1 eV to 20 eV using the Kroll Watson Approximation (KWA) \footnote{N. M. Kroll and K. M. Watson Phys. Rev. A 8, 804 (1973)}. According to the KWA, laser assisted free-free scattering is target independent. Our results are therefore generic for all neutral atomic and molecular species.