Crystallographic directions Atoms 4 Eikonal approximations 4 Grazing incidence 4 Grazing scattering 4 Interference effects 4 Lithium compounds 4 Projectile distributions 4 Projectiles 4 Surface scattering 4 Ab initio 2 Atomic beams 2 Calculations 2 Collision systems 2 Condensed matter physics 2 DFT potential 2 Density functional theory 2 Diffraction 2 Dissipative effects 2 Distorted wave methods 2 Distorted waves 2 Energy dissipation 2 Energy loss 2 Energy loss distributions 2 Energy-loss spectrum 2 Fast atom diffractions 2 Friction 2 Helium 2 Helium atom 2 Initial value representation 2