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X-Ray Photoelectron Diffraction in the Backscattering Geometry: A Key to Adsorption Sites and Bond Lengths at Surfaces
Phys. Rev. Lett. 81, 1654 – Published 24 August, 1998
DOI: https://doi.org/10.1103/PhysRevLett.81.1654
Abstract
For a well-characterized adsorbate phase of oxygen on rhodium (111) we have identified photoelectron interference fringes in the backscattering geometry for O adsorbate emission at 723 eV kinetic energy. Although these features are weak, they show up as characteristic rings covering large regions of the full hemispherical photoelectron diffraction pattern. They represent the situation of a simple two-atom electron interferometer and yield directly the most relevant information on the adsorbate geometry such as the adsorption site, the adsorbate-substrate bond length, and the bond angle.
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