Interpretation of the Nitrogen KVV Auger Lineshape from Alkali Metal Nitrates.
Abstract
Experimental N KVV Auger lineshapes from sodium nitrate, produced by both x-ray (XEA) and electron (EEA) excitation, are compared to theoretically derived lineshapes based on populations derived from a GTO-LCAO-X alpha model. The one-electron orbital energies and valence line widths are determined from x-ray emission and photoelectron data; the Auger matrix elements are determined from experimental gas phase atomic Auger data. The theoretical Auger energies include hole-hole repulsion and relaxation. Theoretical lineshapes using the local and the Mulliken x alpha populations are generated, and a set of empirical populations are also determined. This work emphasizes the importance of shake-off arising from creation of the initial core hole and its effect on the Auger lineshape. A theoretical shake/Auger satellites lineshape is generated and found to contribute up to 35% of the total intensity. The XEA and EEA lineshapes (after correction for the sample and spectrometer transmission response) each show five features, but some differences are noted. These are attributed primarily to beam damage and charging effects on the EEA lineshape. The theoretical lineshapes reproduces the five principal features of the experimental spectra; specific features in the lineshape are shown to reflect the relative size of the Auger matrix elements, the symmetry of the NO3 ion, and satellite contributions. Arguments for the validity of a one-electron orbital model to describe the Auger lineshape are presented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1981
- Accession Number
- ADA105877
Entities
People
- Brett I. Dunlap
- David E. Ramaker
- F. L. Hutson
- J. D. Ganjei
- J. S. Murday
Organizations
- George Washington University