ABSTRACT
In the previous chapters we considered elastic scattering of the incident particle. This is characterized by the fact that the energy of the scattered particle does not change between the initial and final state. We assumed that to describe such scattering, the incident particle can be considered to be moving in an effective potential. The simplest was the high energy case, where we could use the Born approximation on a Hartree or Thomas-Fermi potential. As the energy of the particle decreases, we found that better potentials were required, such as the Hartree-Fock exchange potential and the polarization correction potential.
