Thin films of PuSix s0.5x2d were prepared by sputter deposition and studied by x-ray and ultraviolet photoelectron spectroscopy. Photoemission of the Pu 4f core levels and the Pu 5f valence band states showed first a breakdown of 5f band behavior at low Si content, but then an increasing tendency for 5f hybridization
for more diluted PuSix systems. In valence band spectra, a broad peak at high binding energy is observed for concentrated systems sPuSid. It is replaced by a sharp three-peak structure close to the Fermi level for more diluted systems sPuSi2d. Both structures are discussed in terms of final-state multiplets of localized 5f states
with different degrees of hybridization. It is concluded that multiplets and final-state effects occur quite generally in Pu systems and explain many of the spectral features, which often have been ascribed to the ground-state density of state.
GOUDER Thomas;
ELOIRDI Rachel;
REBIZANT Jean;
BOULET Pascal;
HUBER Frank;
2005-09-12
AMER INST PHYSICS
JRC30444
https://publications.jrc.ec.europa.eu/repository/handle/JRC30444,
