Afanas'ev, Viktor P. und Gryazev, Alexander S. und Efremenko, Dmitry und Kaplya, Pavel S. und 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), Seiten 1-6. Institute of Physics (IOP) Publishing. doi: 10.1088/1742-6596/941/1/012019. ISSN 1742-6588.
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Offizielle URL: http://dx.doi.org/10.1088/1742-6596/941/1/012019
Kurzfassung
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.
elib-URL des Eintrags: | https://elib.dlr.de/118456/ | ||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||
Titel: | 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 | ||||||||||||||||||||||||
Autoren: |
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Datum: | 2017 | ||||||||||||||||||||||||
Erschienen in: | Journal of Physics: Conference Series | ||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||
Band: | 941 | ||||||||||||||||||||||||
DOI: | 10.1088/1742-6596/941/1/012019 | ||||||||||||||||||||||||
Seitenbereich: | Seiten 1-6 | ||||||||||||||||||||||||
Verlag: | Institute of Physics (IOP) Publishing | ||||||||||||||||||||||||
ISSN: | 1742-6588 | ||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||
Stichwörter: | inelastic scattering, photoelectron spectrum, retrieval | ||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||
HGF - Programmthema: | Forschung unter Weltraumbedingungen | ||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||
DLR - Forschungsgebiet: | R FR - Forschung unter Weltraumbedingungen | ||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Materialdesign und neue Materialien | ||||||||||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Methodik der Fernerkundung > Atmosphärenprozessoren | ||||||||||||||||||||||||
Hinterlegt von: | Efremenko, Dr Dmitry | ||||||||||||||||||||||||
Hinterlegt am: | 24 Jan 2018 12:35 | ||||||||||||||||||||||||
Letzte Änderung: | 14 Dez 2023 11:36 |
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