M3,2-Edge X-Ray Absorption Near Edge Structure of 5d Metals

We report M3,2 edge XANES measurements for a series of 5d metals, Hf, Ta, W, Re, Ir, Pt and Au using a total electron yield technique. It was found that the M3,2 XANES for most 5d metals exhibit intense resonances at the threshold (whitelines). The area under the whitetine correlates with the unoccupied densities of d states of the metal. The M3,2 XANES features and their systematic are comparable to their L3,2 counterparts. These results clearly suggest that M3,2 edge XANES can be ased as an alternative probe to the conventional L3,2 -edge XANES for the unoccupied densities of d states of the 5d metals and their compounds