Interpretation of photoemission and bremsstrahlung isochromat spectra of uranium compounds

Journal Article · Sun May 15 04:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.37.8082· OSTI ID:5329092

Laubschat, C; Grentz, W; Kaindl, G

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), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 37:14; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE COMPOUNDS
BREMSSTRAHLUNG
CHEMICAL SHIFT
COHERENT SCATTERING
DIFFRACTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ENERGY LEVELS
F STATES
HYBRIDIZATION
PHOTOELECTRON SPECTROSCOPY
PLATINUM COMPOUNDS
RADIATIONS
SCATTERING
SCREENING
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
URANIUM COMPOUNDS
X-RAY DIFFRACTION