Abstract

The angular distribution of the Auger emission from Ni(100), Ni(100) c(2 × 2)- S, Al(001) and Al(110) has been studied by recording azimuthal and polar profiles for the nickel and sulfur MVV Auger peaks and for the aluminum LVV Auger peak. The character of the anisotropy is very different for the aluminum and nickel surfaces: the profiles are rather smooth for aluminum and present numerous sharp structures for nickel. Moreover when the sulfur overlayer is present, the nickel Auger peak anisotropy is strongly perturbed and the emission anisotropy of the sulfur Auger peak is found very important.

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