Computer simulation of Ne⁺ ions scattering from the Cu(100) and GaP(100) surfaces at grazing incidence

The peculiarities of the low energy Ne ⁺ ion scattering by the GaP(100) step-like surface and the refocusing effect of particles reflected from the surface Cu(100) semi channels have been investigated by both computer simulation and analytical methods. The shapes of trajectories of refocused particles have been carefully studied. For the different surface semi channels, the analytical expressions of refocusing energy have been obtained. The energy and angular distributions of ions de channeled from semi-infinite steps on the GaP(100) surface have been presented. It was shown that the dechanneling ions form characteristic peaks in the angular and energy distributions of scattered ions (authors)