Azimuth-energy anisotropy of Ar ions scattered from a Ni(111) surface

The azimuthal anisotropy of 3 keV Ar + ions scattered from a Ni(111) single crystal surface at relatively large angle (θ = 40°) is investigated. Shadowing mode (incidence angle, α = 5° measured from the surface) was used. Correlation between the azimuthal anisotropy and the energy distribution of the scattered ions is observed both experimentally and by computer simulations using a MARLOWE-based computer code. A noticeable dependence of the primary ion azimuthal angular distribution on the energy of the scattered particles is observed.