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Extracting the differential inverse inelastic mean free path and differential surface excitation probability of Tungsten from X-ray photoelectron spectra and electron energy loss spectra

Afanas'ev, Viktor P. and Gryazev, Alexander S. and Efremenko, Dmitry and Kaplya, Pavel S. and Kuznetcova, A V (2017) Extracting the differential inverse inelastic mean free path and differential surface excitation probability of Tungsten from X-ray photoelectron spectra and electron energy loss spectra. Journal of Physics: Conference Series, 941 (1), pp. 1-6. Institute of Physics (IOP) Publishing. DOI: 10.1088/1742-6596/941/1/012019 ISSN 1742-6588

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Official URL: http://dx.doi.org/10.1088/1742-6596/941/1/012019

Abstract

Precise knowledge of the differential inverse inelastic mean free path (DIIMFP) and differential surface excitation probability (DSEP) of Tungsten is essential for many fields of material science. In this paper, a fitting algorithm is applied for extracting DIIMFP and DSEP from X-ray photoelectron spectra and electron energy loss spectra. The algorithm uses the partial intensity approach as a forward model, in which a spectrum is given as a weighted sum of cross-convolved DIIMFPs and DSEPs. The weights are obtained as solutions of the Riccati and Lyapunov equations derived from the invariant imbedding principle. The inversion algorithm utilizes the parametrization of DIIMFPs and DSEPs on the base of a classical Lorentz oscillator. Unknown parameters of the model are found by using the fitting procedure, which minimizes the residual between measured spectra and forward simulations. It is found that the surface layer of Tungsten contains several sublayers with corresponding Langmuir resonances. The thicknesses of these sublayers are proportional to the periods of corresponding Langmuir oscillations, as predicted by the theory of R.H. Ritchie.

Item URL in elib:https://elib.dlr.de/118456/
Document Type:Article
Title:Extracting the differential inverse inelastic mean free path and differential surface excitation probability of Tungsten from X-ray photoelectron spectra and electron energy loss spectra
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Afanas'ev, Viktor P.National Research University "Moscow Power Engineering Institute", RussiaUNSPECIFIED
Gryazev, Alexander S.National Research University "Moscow Power Engineering Institute", RussiaUNSPECIFIED
Efremenko, Dmitrydmitry.efremenko (at) dlr.deUNSPECIFIED
Kaplya, Pavel S.National Research University "Moscow Power Engineering Institute", RussiaUNSPECIFIED
Kuznetcova, A VNational Research University "Moscow Power Engineering Institute", RussiaUNSPECIFIED
Date:2017
Journal or Publication Title:Journal of Physics: Conference Series
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:941
DOI :10.1088/1742-6596/941/1/012019
Page Range:pp. 1-6
Publisher:Institute of Physics (IOP) Publishing
ISSN:1742-6588
Status:Published
Keywords:inelastic scattering, photoelectron spectrum, retrieval
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialdesign und neue Materialien
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Efremenko, Dr Dmitry
Deposited On:24 Jan 2018 12:35
Last Modified:08 Mar 2018 18:44

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