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X-Ray K-Absorption Spectra and Electronic Structures of Vanadium Hydrides and Deuterides

The K-absorption spectrum of pure vanadium undergoes remarkable changes when hydrogen or deuterium is added to the metal: fine structures near the K-edge diminish and become indistinct with a progressive upward shift of the edge, and other structures well above the edge are lowered in energy. These changes suggest that an electronic structure with p-component above the Fermi level is strongly perturbed by the presence of interstitial hydrogen atoms. The data are discussed in the light of current band calculations on vanadium and its hydrides.