Fast atom diffractions 28 Atoms 26 Diffraction 22 Initial value representation 12 Projectiles 12 Condensed matter physics 10 Grazing scattering 10 Quantum interference 10 Density functional theory 8 Eikonal approximations 8 Projectile distributions 8 Surface scattering 8 Axial surface channeling 6 Crystal surfaces 6 Experimental spectra 6 Interference structures 6 Potential Model 6 Surface interactions 6 ATOM DIFFRACTION 4 Atomic beams 4 Beam collimation 4 Collision systems 4 DIFRACCION ATOMICA 4 Dissipative effects 4 Energy-loss spectrum 4 Grazing incidence 4 Inelastic contributions 4 Interference mechanisms 4 Lithium compounds 4 Projectile surface 4