Surface Extended-X-Ray-Absorption Fine Structure by Means of Photon-Stimulated Ion Desorption: O on Mo(100)

Abstract

The photon-stimulated desorption (PSD) of ${\mathrm{O}}^{+}$ ions from the $\alpha$-oxygen phase on Mo(100) has been monitored through and above the Mo $L_1\mathrm{}\left(2s\right)\mathrm{}$ absorption edge (2866 eV) and is compared to the absorption spectrum of clean Mo(100). The PSD ion yield is shown to reveal the extended-x-ray-absorption fine structure of Mo surface atoms which were bonded to oxygen atoms prior to their desorption. Studies of the present kind provide a new powerful tool for surface structure investigations.