Momentum correlation of the final-state wavefunction for (e, 3e) collisions on helium

Based on our earlier paper, the momentum correlation of the four bodies in the final state is further considered for (e, 3e) processes on helium. A fivefold differential cross section (FDCS) for electron-impact double ionization of helium is calculated by use of the modified model for high incident energy (1－5.6keV). It has been found that the present results give a better description for the experimental data, as compared with the results of our earlier paper.