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Title: Background proportional enhancement of the extended fine structure in nonresonant inelastic x-ray scattering.

Abstract

We report new measurements and calculations of the nonresonant inelastic x-ray scattering (NRIXS) from Mg and Al for a wide range of momentum transfers, q. Extended oscillations in the dynamic structure factor S(q,omega) due to scattering from the 2p and 2s orbitals (i.e., L edges) are observed out to more than 150 eV past the binding energy. These results are discussed in context of the recently proposed representation of S(q,{omega}) for core shells as an atomic background modulated by interference between different photoelectron scattering paths, in analogy to the standard treatment of extended x-ray absorption fine structure. In agreement with this representation, we find a strong increase in the atomic background with increasing q with a concomitant enhancement in the amplitude of the extended fine structure. This effect should be generic and hence may enable improved measurement of the extended fine structure in a wide range of materials containing low-Z elements.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Summer Research Institute Program; Academy of Finland; Univ. of Washington; Natural Sciences and Engineering Research Council of Canada (NSERC)
OSTI Identifier:
914974
Report Number(s):
ANL/XSD/JA-58791
Journal ID: ISSN 0163-1829; PRBMDO; TRN: US200817%%44
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. B; Journal Volume: 74; Journal Issue: Dec. 29, 2006
Country of Publication:
United States
Language:
ENGLISH
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; INELASTIC SCATTERING; X-RAY DIFFRACTION; FINE STRUCTURE; MAGNESIUM; ALUMINIUM; MOMENTUM TRANSFER; OSCILLATIONS; STRUCTURE FACTORS

Citation Formats

Fister, T. T., Seidler, G. T., Hamner, C., Cross, J. O., Soininen, J. A., Rehr, J. J., Univ. of Washington, and Univ. of Helsinki. Background proportional enhancement of the extended fine structure in nonresonant inelastic x-ray scattering.. United States: N. p., 2006. Web. doi:10.1103/PhysRevB.74.214117.
Fister, T. T., Seidler, G. T., Hamner, C., Cross, J. O., Soininen, J. A., Rehr, J. J., Univ. of Washington, & Univ. of Helsinki. Background proportional enhancement of the extended fine structure in nonresonant inelastic x-ray scattering.. United States. doi:10.1103/PhysRevB.74.214117.
Fister, T. T., Seidler, G. T., Hamner, C., Cross, J. O., Soininen, J. A., Rehr, J. J., Univ. of Washington, and Univ. of Helsinki. Fri . "Background proportional enhancement of the extended fine structure in nonresonant inelastic x-ray scattering.". United States. doi:10.1103/PhysRevB.74.214117.
@article{osti_914974,
title = {Background proportional enhancement of the extended fine structure in nonresonant inelastic x-ray scattering.},
author = {Fister, T. T. and Seidler, G. T. and Hamner, C. and Cross, J. O. and Soininen, J. A. and Rehr, J. J. and Univ. of Washington and Univ. of Helsinki},
abstractNote = {We report new measurements and calculations of the nonresonant inelastic x-ray scattering (NRIXS) from Mg and Al for a wide range of momentum transfers, q. Extended oscillations in the dynamic structure factor S(q,omega) due to scattering from the 2p and 2s orbitals (i.e., L edges) are observed out to more than 150 eV past the binding energy. These results are discussed in context of the recently proposed representation of S(q,{omega}) for core shells as an atomic background modulated by interference between different photoelectron scattering paths, in analogy to the standard treatment of extended x-ray absorption fine structure. In agreement with this representation, we find a strong increase in the atomic background with increasing q with a concomitant enhancement in the amplitude of the extended fine structure. This effect should be generic and hence may enable improved measurement of the extended fine structure in a wide range of materials containing low-Z elements.},
doi = {10.1103/PhysRevB.74.214117},
journal = {Phys. Rev. B},
number = Dec. 29, 2006,
volume = 74,
place = {United States},
year = {Fri Dec 29 00:00:00 EST 2006},
month = {Fri Dec 29 00:00:00 EST 2006}
}
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