Quantitative analysis of Yb 4d photoelectron spectrum of metallic Yb

N. Pauly , Francisco Yubero, Sven Mosbæk Tougaard

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

The measured Yb 4d3/2 intensity is larger than the Yb 4d5/2 in X-ray photoelectron (XPS) emission of metallic Yb, which is unexpected. The shape and intensity of photoelectron peaks are strongly affected by extrinsic excitations due to electron transport out of the surface (including bulk and surface effects) and to intrinsic excitations due to the sudden creation of the static core hole. To quantitatively extract from experimental XPS the primary excitation spectrum (ie, the initial excitation process) of the considered transition, these effects must be included within the theoretical description. The combined effect of both extrinsic and intrinsic excitations can be described by an effective energy-differential inelastic electron scattering cross section for XPS evaluated by a dielectric response model with the dielectric function as only input. Then, using this cross section, a direct evaluation of the primary excitation spectrum is performed by standard peak shape analysis for thick homogeneous samples. We use this approach in the present paper to determine the Yb 4d photoemission spectrum for metallic Yb. We show that the unexpected larger intensity of Yb 4d3/2 compared to 4d5/2 can be fully accounted for by our model and that the total spectrum consists of a sum of symmetric primary excitation peaks.
OriginalsprogEngelsk
TidsskriftSurface and Interface Analysis
Vol/bind50
Udgave nummer11
Sider (fra-til)1168-1173
ISSN0142-2421
DOI
StatusUdgivet - 2018

Fingeraftryk

Photoelectrons
quantitative analysis
photoelectrons
X ray photoelectron spectroscopy
Chemical analysis
excitation
Inelastic scattering
Electron scattering
Photoemission
X rays
scattering cross sections
electron scattering
inelastic scattering
photoelectric emission
evaluation
cross sections
electrons
x rays

Citer dette

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title = "Quantitative analysis of Yb 4d photoelectron spectrum of metallic Yb",
abstract = "The measured Yb 4d3/2 intensity is larger than the Yb 4d5/2 in X-ray photoelectron (XPS) emission of metallic Yb, which is unexpected. The shape and intensity of photoelectron peaks are strongly affected by extrinsic excitations due to electron transport out of the surface (including bulk and surface effects) and to intrinsic excitations due to the sudden creation of the static core hole. To quantitatively extract from experimental XPS the primary excitation spectrum (ie, the initial excitation process) of the considered transition, these effects must be included within the theoretical description. The combined effect of both extrinsic and intrinsic excitations can be described by an effective energy-differential inelastic electron scattering cross section for XPS evaluated by a dielectric response model with the dielectric function as only input. Then, using this cross section, a direct evaluation of the primary excitation spectrum is performed by standard peak shape analysis for thick homogeneous samples. We use this approach in the present paper to determine the Yb 4d photoemission spectrum for metallic Yb. We show that the unexpected larger intensity of Yb 4d3/2 compared to 4d5/2 can be fully accounted for by our model and that the total spectrum consists of a sum of symmetric primary excitation peaks.",
author = "N. Pauly and Francisco Yubero and Tougaard, {Sven Mosb{\ae}k}",
year = "2018",
doi = "10.1002/sia.6402",
language = "English",
volume = "50",
pages = "1168--1173",
journal = "Surface and Interface Analysis",
issn = "0142-2421",
publisher = "JohnWiley & Sons Ltd.",
number = "11",

}

Quantitative analysis of Yb 4d photoelectron spectrum of metallic Yb. / Pauly , N.; Yubero, Francisco; Tougaard, Sven Mosbæk.

I: Surface and Interface Analysis, Bind 50, Nr. 11, 2018, s. 1168-1173.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Quantitative analysis of Yb 4d photoelectron spectrum of metallic Yb

AU - Pauly , N.

AU - Yubero, Francisco

AU - Tougaard, Sven Mosbæk

PY - 2018

Y1 - 2018

N2 - The measured Yb 4d3/2 intensity is larger than the Yb 4d5/2 in X-ray photoelectron (XPS) emission of metallic Yb, which is unexpected. The shape and intensity of photoelectron peaks are strongly affected by extrinsic excitations due to electron transport out of the surface (including bulk and surface effects) and to intrinsic excitations due to the sudden creation of the static core hole. To quantitatively extract from experimental XPS the primary excitation spectrum (ie, the initial excitation process) of the considered transition, these effects must be included within the theoretical description. The combined effect of both extrinsic and intrinsic excitations can be described by an effective energy-differential inelastic electron scattering cross section for XPS evaluated by a dielectric response model with the dielectric function as only input. Then, using this cross section, a direct evaluation of the primary excitation spectrum is performed by standard peak shape analysis for thick homogeneous samples. We use this approach in the present paper to determine the Yb 4d photoemission spectrum for metallic Yb. We show that the unexpected larger intensity of Yb 4d3/2 compared to 4d5/2 can be fully accounted for by our model and that the total spectrum consists of a sum of symmetric primary excitation peaks.

AB - The measured Yb 4d3/2 intensity is larger than the Yb 4d5/2 in X-ray photoelectron (XPS) emission of metallic Yb, which is unexpected. The shape and intensity of photoelectron peaks are strongly affected by extrinsic excitations due to electron transport out of the surface (including bulk and surface effects) and to intrinsic excitations due to the sudden creation of the static core hole. To quantitatively extract from experimental XPS the primary excitation spectrum (ie, the initial excitation process) of the considered transition, these effects must be included within the theoretical description. The combined effect of both extrinsic and intrinsic excitations can be described by an effective energy-differential inelastic electron scattering cross section for XPS evaluated by a dielectric response model with the dielectric function as only input. Then, using this cross section, a direct evaluation of the primary excitation spectrum is performed by standard peak shape analysis for thick homogeneous samples. We use this approach in the present paper to determine the Yb 4d photoemission spectrum for metallic Yb. We show that the unexpected larger intensity of Yb 4d3/2 compared to 4d5/2 can be fully accounted for by our model and that the total spectrum consists of a sum of symmetric primary excitation peaks.

U2 - 10.1002/sia.6402

DO - 10.1002/sia.6402

M3 - Journal article

VL - 50

SP - 1168

EP - 1173

JO - Surface and Interface Analysis

JF - Surface and Interface Analysis

SN - 0142-2421

IS - 11

ER -