E-p off-shell cross section in quasielastic (e,e'p) reactions.

Abstract

By carrying out calculations on $^{208}\mathrm{Pb}$(e,e'p) reactions at different electron beam energies for fixed knocked-out proton kinematics, we examined whether, even in the presence of Coulomb distortions of the electron waves, the (e,e'p) cross section can still be separated into a reduced cross section ${\mathrm{\ensuremath{\sigma}}}_{\mathrm{red}}$(${\mathit{p}}_{\mathit{m})}$ and the e-p off-shell cross section. We found that if one uses an effective momentum approximation in calculating the e-p off-shell cross section, one gets a reduced cross section which is independent of the electron kinematics within a few percent.