Multiple electron emission from argon by 1 MeV proton impact is studied usi
ng the CDW-EIS model. Knowledge of the contributions to the total emission
from all the orbitals of the target atom and the inclusion of secondary pro
cesses like Auger transitions allow us to give a quantitative explanation o
f recent experiments where the electron emission spectra was taken in coinc
idence with the recoil-ion charge state.