Studies of total density of states of metals up to 70 eV aboveEF

Abstract

We present bremsstrahlung-isochromat spectroscopy (BIS) measurements and density-of-states (DOS) calculations extending 70 eV above $E_F$. The BIS spectra show considerable structure, which is clearly seen to be dominated by total DOS effects. However, we find discrepancies between energy positions in the experimental and theoretical structures in many transition- and noble-metal elements, which are small below 10 eV, but typically 5–8 % at higher energies. We also compare BIS and x-ray absorption spectra up to 70 eV above threshold to clarify the influence of core-hole potential.