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Title: Line shape of the Ag M{sub 4,5}VV Auger spectra measured by Auger-photoelectron coincidence spectroscopy

Abstract

We present high resolution Ag M{sub 5}VV and M{sub 4}VV Auger spectra obtained in coincidence with 3d{sub 5/2} and 3d{sub 3/2} core photoelectrons, respectively. Auger photoelectron coincidence spectroscopy (APECS) was used to separate these overlapping Auger lines and determine the intrinsic line shape of each spectrum. As the on-site Coulomb correlation energy U of Ag is comparable to twice the 4d bandwidth, 2W, (i.e., U/2W{approx}1), the coincidence Auger spectra exhibit both atomiclike and bandlike character. We find that whether considered separately or in combination, neither bandlike nor atomiclike line shapes give a satisfactory account of these Auger spectra. Instead, the intrinsic Ag M{sub 5}VV and M{sub 4}VV line shapes are well described by the Cini-Sawatzky theory when it is applied separately to each component of the multiplet structure of the 4d{sup 8}5s{sup 2} Auger final state. A fit to the APECS data indicates that the correlation energy the {sup 1}G{sub 4} multiplet is 4.8{+-}0.1eV. Furthermore, our analysis indicates that the missing intensity in the vicinity of the {sup 3}F{sub 4} multiplet in the Ag M{sub 5}VV Auger line, which has been noted in previous studies, results from a shift in the spectral weight of this multiplet component to higher kineticmore » energy, into the bandlike region of the spectrum.« less

Authors:
; ; ; ;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40205475
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 63; Journal Issue: 15; Other Information: DOI: 10.1103/PhysRevB.63.155102; Othernumber: PRBMDO000063000015155102000001; 084112PRB; PBD: 15 Apr 2001; Journal ID: ISSN 0163-1829
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRON CORRELATION; KINETIC ENERGY; MULTIPLETS; RESOLUTION; SHAPE; SPECTRA; SPECTROSCOPY

Citation Formats

Arena, D A, Bartynski, R A, Nayak, R A, Weiss, A H, and Hulbert, S L. Line shape of the Ag M{sub 4,5}VV Auger spectra measured by Auger-photoelectron coincidence spectroscopy. United States: N. p., 2001. Web. doi:10.1103/PhysRevB.63.155102.
Arena, D A, Bartynski, R A, Nayak, R A, Weiss, A H, & Hulbert, S L. Line shape of the Ag M{sub 4,5}VV Auger spectra measured by Auger-photoelectron coincidence spectroscopy. United States. doi:10.1103/PhysRevB.63.155102.
Arena, D A, Bartynski, R A, Nayak, R A, Weiss, A H, and Hulbert, S L. Sun . "Line shape of the Ag M{sub 4,5}VV Auger spectra measured by Auger-photoelectron coincidence spectroscopy". United States. doi:10.1103/PhysRevB.63.155102.
@article{osti_40205475,
title = {Line shape of the Ag M{sub 4,5}VV Auger spectra measured by Auger-photoelectron coincidence spectroscopy},
author = {Arena, D A and Bartynski, R A and Nayak, R A and Weiss, A H and Hulbert, S L},
abstractNote = {We present high resolution Ag M{sub 5}VV and M{sub 4}VV Auger spectra obtained in coincidence with 3d{sub 5/2} and 3d{sub 3/2} core photoelectrons, respectively. Auger photoelectron coincidence spectroscopy (APECS) was used to separate these overlapping Auger lines and determine the intrinsic line shape of each spectrum. As the on-site Coulomb correlation energy U of Ag is comparable to twice the 4d bandwidth, 2W, (i.e., U/2W{approx}1), the coincidence Auger spectra exhibit both atomiclike and bandlike character. We find that whether considered separately or in combination, neither bandlike nor atomiclike line shapes give a satisfactory account of these Auger spectra. Instead, the intrinsic Ag M{sub 5}VV and M{sub 4}VV line shapes are well described by the Cini-Sawatzky theory when it is applied separately to each component of the multiplet structure of the 4d{sup 8}5s{sup 2} Auger final state. A fit to the APECS data indicates that the correlation energy the {sup 1}G{sub 4} multiplet is 4.8{+-}0.1eV. Furthermore, our analysis indicates that the missing intensity in the vicinity of the {sup 3}F{sub 4} multiplet in the Ag M{sub 5}VV Auger line, which has been noted in previous studies, results from a shift in the spectral weight of this multiplet component to higher kinetic energy, into the bandlike region of the spectrum.},
doi = {10.1103/PhysRevB.63.155102},
journal = {Physical Review B},
issn = {0163-1829},
number = 15,
volume = 63,
place = {United States},
year = {2001},
month = {4}
}