The dependence of the height of the elastic peak and the Auger signal on the incidence angle of the primary electron beam was used to investigate the crystalline structure of the Ag/Cu(001) adsorption system. For the clean Cu(001) face experimental elastic peak profiles were compared with results of single scattering cluster (SSC) calculations, where main intensity maxima are reproduced. Auger scans for CuM 2 , 3 VV and LMM transitions and elastic peak scans exhibit similar maxima for the same E p =2.0keV. For 8ML of Ag the populations of four possible domains of Ag(111) were determined by an R-factor analysis. The growth of one domain was found to be preferred which can be rationalised by the miscut of the sample and the resulting step orientation.