Quasifree (e,e'p) reactions on nuclei with neutron excess

We study the evolution of the (e,e'p) cross section on nuclei with
increasing asymmetry between the number of neutrons and protons.
The calculations are done within the framework of the distorted-wave
impulse approximation, adopting nonrelativistic and relativistic models.
We compare the results obtained with three different approaches based on
the mean-field description for the proton bound state wave function.
In the nonrelativistic model phenomenological Woods-Saxon and
Hartree-Fock wave functions are used, in the relativistic model the wave functions are solutions of Dirac-Hartree equations.
The models are first tested against experimental data on $^{16}$O,
$^{40}$Ca, and $^{48}$Ca nuclei, and then they are applied
to calculate \eep cross sections for a set of spherical calcium and oxygen
isotopes.
From the comparison of the results obtained for the various
isotopes we can infer information about the dependence of the various
ingredients of the models on the neutron to proton asymmetry.