LAUSR

The charge distributions and elastic electron form factors for 18O, 42,44Ca, 58Ni, and 118Sn nuclei are considered using the cluster extension of the 1- and 2-body terms. Inelastic electron form factors to 2+ states with Core-Polarization effects studied where the nuclear collective modes beside to the shell model transition density are considered. The influence of SRC's be calculated by the parameter β which is introduced into the ground state charge distribution concluded the Jastrow function. It is found that the inclusion of 2-body correlations are necessary to describe the observed data of elastic and inelastic form factor at high range of momentum transfer q > 3 fm-1.