%0 Journal Article
%T Grazing incidence fast atom diffraction for He atoms impinging on a Ag(110) surface
%A C. A. R¨ªos Rubiano
%A G. A. Bocan
%A M. S. Gravielle
%A N. Bundaleski
%A H. Khemliche
%A P. Roncin
%J Physics
%D 2013
%I arXiv
%X Experimental diffraction patterns produced by grazing scattering of fast helium atoms from a Ag(110) surface are used as a sensitive tool to test both the scattering and the potential models. To describe the elastic collision process we employ the surface eikonal (SE) approximation, which is a semi-classical method that includes the quantum interference between contributions coming from different projectile paths. The projectile-surface potential is derived from an accurate density-functional theory (DFT) calculation that takes into account the three degrees of freedom of the incident projectile. A fairly good agreement between theoretical and experimental momentum distributions is found for incidence along different low-indexed crystallographic directions.
%U http://arxiv.org/abs/1303.2640v1