Influence of elastic and inelastic scattering on energy spectra of electrons emitted from solids

Tougaard, S.; Sigmund, Peter

doi:10.1103/physrevb.25.4452

Cited by 418 publications

(155 citation statements)

References 37 publications

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“…Meanwhile numerous studies indicate that the ignoring of elastic scattering may cause serious errors in quantitative interpretation of the experimental data [2][3][4][5][6][7]. Elastic collisions have been found to affect noticeably the medium energy electron transport in solids and to lead to an overall decrease in the effective escape depth by several tens of percent with respect to the value predicted by Eq.…”

Section: (845)mentioning

confidence: 99%

Mean Escape Depth of Signal Photoelectrons from Amorphous and Polycrystalline Solids

1994

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• Escape depth of photoelectrons leaving a target without being scattered inelastically was submitted to extensive theoretical analysis. Dependence of the mean escape depth on the X-ray angle of incidence and the electron initial angular distribution inside the sample was considered. The Monte Carlo algorithm was developed basing on a differential elastic scattering cross--section calculated within the partial-wave expansion method and a realistic electron-atom mteraction potential. The mean escape depth was evaluated by means of the depth distribution function found analytically by solving a kinetic equation and by the Monte Carlo technique. The agreement between the results obtained from two methods is excellent. Elastic scattering was found to reduce considerably the escape depth. This reduction may reach up to 25% in the case of heavy elements in the practical X-ray photoelectron spectroscopy analysis. It was shown that the mean escape depth expressed in units of the electron transport mean free path is a universal function of the ratio of the inelastic to the transport mean free paths, the asymmetry parameter and the X-ray angle of incidence. A simple explicit expression for this function is proposed.

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Section: (845)mentioning

confidence: 99%

Mean Escape Depth of Signal Photoelectrons from Amorphous and Polycrystalline Solids

1994

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“…The background in the XP-spectra is subtracted by applying a Tougaard-style background [10]. Peaks are fitted using a Doniach-Šunjić-type function [11].…”

Section: Methodsmentioning

confidence: 99%

Interaction of energetic oxygen ions with the beryllium tungsten alloy Be₂W

et al. 2011

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In this study the interaction of energetic oxygen ions with the beryllium-tungsten alloy Be 2 W is investigated by depth-resolved X-ray photo-electron spectroscopy (XPS). A 4 nm tungsten layer is deposited on polycrystalline beryllium. By alloying at 900 K for 60 min Be 2 W is formed. In successive steps oxygen ions are implanted with 500 and 1000 V acceleration voltage with a fluence of 5 · 10 14 cm -2 in each step. Between the single implantation steps the sample is heated for 30 min at 600 K. Depth-resolved photoelectron spectroscopy is performed after each experimental step. The W 4f and Be 1s spectra reveal formation of beryllium tungstate BeWO 4 already at room temperature (r.t.) in significant amounts due to energy deposition of implanted oxygen ions. No indication for oxygen diffusion at r.t. is observed. In previous experiments in thermal equilibrium the ternary compound has proven to be stable to temperatures up to 1073 K. Contrary to these results, annealing at 600 K already leads to decomposition of BeWO 4 formed by energetic oxygen ions. After decomposition at 600 K oxygen stays in the sample bound as BeO.

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“…This extra component is approximated by a linear function near the position of the peak maximum. 18 In the profile analysis of the photoelectron spectra a DS peak shape was used, 13…”

Section: B Analysis Of Photoemission Spectramentioning

confidence: 99%

A method for the experimental determination of surface photoemission core-level shifts for 3d transition metals

Shamsutdinov

Sloof

Böttger

2005

Journal of Applied Physics

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A method is presented to determine the photoelectron surface core-level shift ͑SCLS͒ of 3d transition metals using x-ray photoelectron spectroscopy. The experimental difficulties arising from the relatively large broadening of photoemission lines in the 3d transition series can be overcome by the analysis of the angular dependence of photoemission spectra. The proposed method has been demonstrated using well-defined single-crystal surfaces of copper. The observed values of the SCLS for copper are compared with those predicted by both ab initio calculations and a macroscopic atom model. The experimental determination of SCLSs opens alternative routes for collecting thermochemical data for surfaces/interfaces.

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Influence of elastic and inelastic scattering on energy spectra of electrons emitted from solids

Cited by 418 publications

References 37 publications

Mean Escape Depth of Signal Photoelectrons from Amorphous and Polycrystalline Solids

Mean Escape Depth of Signal Photoelectrons from Amorphous and Polycrystalline Solids

Interaction of energetic oxygen ions with the beryllium tungsten alloy Be₂W

A method for the experimental determination of surface photoemission core-level shifts for 3d transition metals

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Influence of elastic and inelastic scattering on energy spectra of electrons emitted from solids

Cited by 418 publications

References 37 publications

Mean Escape Depth of Signal Photoelectrons from Amorphous and Polycrystalline Solids

Mean Escape Depth of Signal Photoelectrons from Amorphous and Polycrystalline Solids

Interaction of energetic oxygen ions with the beryllium tungsten alloy Be2W

A method for the experimental determination of surface photoemission core-level shifts for 3d transition metals

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Product

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Interaction of energetic oxygen ions with the beryllium tungsten alloy Be₂W