[en] Molecular dynamics simulations were performed of the energy dissipation of incident atoms after impact onto a 3D FCC lattice with energies in the range 2-3 keV. The interactions between atoms were described using the Lennard-Jones potential parameterized for copper. The impacting directions were <001> and <101>. The results for low energies, of a few electron volts, show that the energy of the impacting atom was dissipated via focused collision sequences (focusons). With increasing energy, cascading bow waves were generated by the focusons, in the close-packed (111) planes only, and carried away the energy of the focusons while, in the high-energy range of a few kiloelectron volts, most of the energy was confined to the lower-index (100) or (110) planes. The structure of these planes was disrupted by secondary focusons generated in these planes, and sputtering occurred when these focusons reach the surface of the substrate. Backward focusons were observed in the low-energy impact case and appeared to be the main reason for the reflection of the impacting ion. (author)