Abstract
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 Ef, 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.
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