Title: Uranium 5d-5f Electric-multipole Transitions Probed by Nonresonant Inelastic X-ray Scattering
Authors: CACIUFFO RobertoVAN DE LAAN G.SIMONELLI L.VITOVA T.MAZZOLI C.DENECKE M. A.LANDER G.h.
Citation: PHYSICAL REVIEW B vol. 81 no. 19 p. 195104-1, 7
Publisher: AMER PHYSICAL SOC
Publication Year: 2010
JRC N°: JRC56751
ISSN: 1098-0121
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC56751
DOI: 10.1103/PhysRevB.81.195104
Type: Articles in Journals
Abstract: Non-resonant inelastic x ray scattering (NIXS) experiments have been performed to probe the 5d-5f electronic transitions at the uranium O4;5 absorption edges in uranium dioxide. For small values of the scattering vector q, the spectra are dominated by dipole-allowed transitions encapsulated within the giant resonance, whereas for higher values of q the multipolar transitions of rank 3 and 5 give rise to strong and well-de¯ned multiplet structure in the pre-edge region. The origin of the observed non-dipole multiplet structures is explained on the basis of many-electron atomic spectral calculations. The results obtained demonstrate the high potential of NIXS as a bulk-sensitive technique for the characterization of the electronic properties of actinide materials.
JRC Institute:Institute for Transuranium Elements

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