PHOTOEMISSION STUDIES OF Pd/D SYSTEM WITH HIGH DEUTERIUM CONTENT

The ultraviolet photoelectron spectroscopy (UPS) spectra of Pd/D system (including absorption at high pressure) with various D contents were measured. The D absorption induced a new peak centered at about 6eV below E_f, which seems to derive from the hybridized states of deuterium and Pd electronic states. Its intensity increases with D content; only part of the D atoms in the Pd lattice are ionized at high D content.