Interpretation of photoemission and bremsstrahlung isochromat spectra of uranium compounds
Bremsstrahlung isochromat (BIS) and U 4f core-level photoemission (PE) spectra of UPt and UPt/sub 5/ are presented and compared with corresponding data: including U 5f valence-band PE spectra: of UBe/sub 13/, as well as with the results of band-structure calculations. The shapes of the BIS, U 5f, and U 4f PE spectra are consistently explained in terms of two differently screened final states, namely an f-screened main peak reflecting the delocalized 5f part of the electronic ground state, and a poorly screened satellite increasing in intensity with decreasing 5f hybridization. The considerably higher relative intensity of the f-screened main peak in 5f PE as compared to BIS spectra is readily explained on the basis of the degeneracies of the relevant 5f screening orbitals in U compounds. The positions of the poorly screened satellites relative to the f-screened main peaks in BIS spectra are found to be related to those of the Pr 4f/sup 3/ BIS multiplets in homologous Pr compounds, i.e., they reflect chemical shifts. It is also realized that the relative intensities of these BIS satellites follow those of the satellite peaks in U 4f core-level PE spectra.
- Research Organization:
- Fachbereich Physik, Freie Universitaet Berlin, Arnimallee 14, D-1000 Berlin 33, West Germany
- OSTI ID:
- 5329092
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Vol. 37:14
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PLATINUM COMPOUNDS
ELECTRONIC STRUCTURE
URANIUM COMPOUNDS
BREMSSTRAHLUNG
CHEMICAL SHIFT
F STATES
HYBRIDIZATION
PHOTOELECTRON SPECTROSCOPY
SCREENING
X-RAY DIFFRACTION
ACTINIDE COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ENERGY LEVELS
RADIATIONS
SCATTERING
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
360104* - Metals & Alloys- Physical Properties