X-ray photoemission spectroscopy study of hexavalent uranium compounds

Journal Article · Mon Dec 15 04:00:00 EST 1975 · Phys. Rev., B, v. 12, no. 12, pp. 5651-5663

DOI:https://doi.org/10.1103/PhysRevB.12.5651· OSTI ID:4115292

Veal, B W; Lam, D J; Carnall, W T; Hoekstra, H R

The electronic structure of the outer occupied levels of a series of hexavalent uranium (predominately uranyl) compounds was studied using x-ray photoemission spectroscopy (XPS). The changes in the spectral features of the outer occupied levels with the variation of the uranium-oxygen bond lengths (1.7-- 2.1 A) are systematically investigated. Previously unexplained spectral structure has been found to result from ligand-field splitting of the occupied U $sup 6$$p$$sub 3$$/$$sub 2$ levels. The XPS results are compared with predictions of a relativistic molecular-cluster calculation and with the results of a simple point-charge crystal-field model. When the crystalline electric fields generated by both the primary and secondary ligands are taken into consideration, excellent quantitative agreement is obtained between the XPS data and the molecular-cluster results with no parameter adjustment. (AIP)

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-017876
• OSTI ID: 4115292
• Journal Information: Phys. Rev., B, v. 12, no. 12, pp. 5651-5663, Journal Name: Phys. Rev., B, v. 12, no. 12, pp. 5651-5663; ISSN PLRBA
• Country of Publication: United States
• Language: English

Related Subjects

*URANIUM COMPOUNDS-- ELECTRONIC STRUCTURE
400600* --Chemistry--Radiation Chemistry
FERMI LEVEL
N50330* --Metals
Ceramics
& Other Materials--Plastics & Other Materials--Properties
Structure & Phase Studies
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
X RADIATION