We present a model for lepton-nucleus interaction which has been developed in a framework successully used to describe a variety of nuclear reactions. It is based on the local density approximation and accounts for some nuclear corrections needed to properly describe the processes induced by an electroweak probe.
We focus our analysis on the role played by the spectral functions which were obtained from a semiphenomenological model for the nucleon self energy inside of a nuclear medium. The RPA (random phase approximation) effects are also considered in order to properly describe the collective excitations of the nuclei. At low energies the model has been compared with the data for muon and radiative pion capture processes. We also present results for the lepton-nucleus scattering cross section for a wide energy-momentum transfer range.