Title: Multiplet Structure in Pu based Compounds - A Photoemission Case Study of PuSix (0.5 <x <2) Films
Citation: PHYSICAL REVIEW B-CONDENSED MATTER vol. 71 p. 165101
Publication Year: 2005
JRC N°: JRC30444
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC30444
Type: Articles in periodicals and books
Abstract: 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.
JRC Directorate:Nuclear Safety and Security

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