The angular intensity distributions of La(M5N4.5N4.5) and B(KL1L1) Auger electrons were measured as a function of polar and azimuthal angles for clean and oxygen-covered (001). The method employed a dispersive cylindrical mirror energy analyzer and a two-axis rotation sample manipulator. Significant structure was observed in both the polar and azimuthal profiles and, at least in the case of La Auger emission, could be partially accounted for using a simple scattering model. Polar profiles obtained by this method and those obtained using angle-resolved X-ray photo-emission exhibited many similarities. The angular intensity profiles were consistent with a model of the surface in which the La layer was outermost on the polar (001) plane and the adsorption of oxygen occurred at both La and B sites.

Angle-Resolved Auger Electron Emission from LaB6(001) with and without Chemisorbed Oxygen. Chambers, S.A., Swanson, L.W.: Surface Science, 1983, 131[2-3], 385-402