Influence of multiple elastic scattering on the shape of the elastically scattered electron peak

Afanas'ev, V. P.; Afanas’ev, M. V.; Лубенченко, А. В.; Batrakov, A. V.; Efremenko, Dmitry; Vos, Maarten

doi:10.1016/j.elspec.2010.01.002

Cited by 13 publications

(5 citation statements)

References 15 publications

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“…As pointed out already in Ref. 26, another small source of additional broadening that could have some effect is due to different isotopes. About 1% of carbon is 13 C, which has, under our scattering conditions, a recoil energy of 5.99 eV rather than 6.49 eV which applies to 12 C. The kinetic energy of 13 C atoms is √ 12/13 of that of 12 C atoms 7 and, using Eq.…”

Section: B Corrections Due To the Presence Of Different Isotopesmentioning

confidence: 71%

“…Multiple scattering trajectories are dominated by a single large-angle and one (or more) small-angle scattering events. 26,30 The contribution to the recoil energy of the latter are very small. Thus, the peak shapes of single and multiple scattered electrons are very similar.…”

Section: A Corrections Due To Multiple Scatteringmentioning

confidence: 98%

“…A candidate for such a broadening mechanism is multiple scattering. Multiple scattering in ECS has been studied both theoretically 26 and by Monte Carlo simulations, 27 and the conclusion of both approaches was that multiple scattering is present but does not affect the outcome much. As only small corrections are required, we decided to do Monte Carlo simulations, employing the actual geometry of the experiment, to see if multiple scattering could cause a small increase in peak width.…”

Section: A Corrections Due To Multiple Scatteringmentioning

confidence: 99%

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The use of electron scattering for studying atomic momentum distributions: The case of graphite and diamond

Vos

Moreh

Tőkési

2011

The Journal of Chemical Physics

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The momentum distributions of C atoms in polycrystalline diamond (produced by chemical vapor deposition) and in highly oriented pyrolitic graphite (HOPG) are studied by scattering of 40 keV electrons at 135°. By measuring the Doppler broadening of the energy of the elastically scattered electrons, we resolve a Compton profile of the motion of the C atoms. The aim of the present work is to resolve long-standing disagreements between the calculated kinetic energies of carbon atoms in HOPG and in diamond films and the measured ones, obtained both by neutron Compton scattering (NCS) and by nuclear resonance photon scattering (NRPS). The anisotropy of the momentum distribution in HOPG was measured by rotating the HOPG sample relative to the electron beam. The obtained kinetic energies for the motion component along, and perpendicular to, the graphite planes were somewhat higher than those obtained from the most recent NCS data of HOPG. Monte Carlo simulations indicate that multiple scattering adds about 2% to the obtained kinetic energies. The presence of different isotopes in carbon affects the measurement at a 1% level. After correcting for these contributions, the kinetic energies are 3%-6% larger than the most recent NCS results for HOPG, but 15%-25% smaller than the NRPS results. For diamond, the corrected direction-averaged kinetic energy is ≈ 6% larger than the calculated value. This compares favorably to the ≈25% discrepancy between theory and both the NCS and NRPS results for diamond.

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Section: B Corrections Due To the Presence Of Different Isotopesmentioning

confidence: 71%

Section: A Corrections Due To Multiple Scatteringmentioning

confidence: 98%

Section: A Corrections Due To Multiple Scatteringmentioning

confidence: 99%

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The use of electron scattering for studying atomic momentum distributions: The case of graphite and diamond

Vos

Moreh

Tőkési

2011

The Journal of Chemical Physics

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“…Interpretation of spectrums of elastic backscattering electrons was detailed discussed in different papers [9][10] backscattering of electrons (quasi-single approximation, discussed in [9]) can be used. In this case it is useful to come to following variables (from optics).…”

Section: Erbs For Depth Profilingmentioning

confidence: 99%

Electron Rutherford back scattering spectroscopy with energy and angular scanning for thin oxide films diagnostics

Kostanovskiy

Afanas'ev

Batrakov

2011

2011 11th IEEE International Conference on Nanotechnology

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Electron Rutherford back scattering spectroscopy (ERBS) is a perspective method for determining composition of thin nano-layers. Modern level of electron energy analysers allows achieving spectrums with energy resolution better than 0.03 eV at electron beam energy up to 15 keV. Clean aluminium sample has been exposed to air to achieve oxidized layer that was cleaned by the ion gun. ERBS spectrums were measured with hemispherical energy analyser at different electron energies. This in-situ technique has been used to get depth composition and to construct complex morphology of the oxide layer.

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“…Fitting of the spectra with a simple Gaussian or Voigt line shape is possible, but is based on a large number of fitting variables, which results in several solutions for the depth profile. The shape of the elastic peak could also be more complex because of multiple elastic scattering [20]. We can conclude, that the quantitative analysis of EPES, measured with a high energy resolution, of hydrocarbon PCVD films is not trivial and is an aim for a detailed discussion.…”

Section: Introductionmentioning

confidence: 99%

Hydrocarbon isotope detection by elastic peak electron spectroscopy

Kostanovskiy

Afanas'ev

Naujoks

et al. 2015

Journal of Electron Spectroscopy and Related Phenomena

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Experimental results on the hydrocarbon isotope analysis by elastic peak electron spectroscopy are presented. Amorphous hydrocarbon samples (a-C:H, a-C:D) are prepared by PCVD and analyzed by nuclear reaction analysis (NRA), elastic recoil detection analysis (ERD), X-ray photoelectron spectroscopy (XPS) and elastic peak electron spectroscopy (EPES). Electron energy spectra show a clear signal from the hydrogen isotopes deuterium and protium. Different incident energies and scattering geometries help to resolve plasmon and elastic energy losses.

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Influence of multiple elastic scattering on the shape of the elastically scattered electron peak

Cited by 13 publications

References 15 publications

The use of electron scattering for studying atomic momentum distributions: The case of graphite and diamond

The use of electron scattering for studying atomic momentum distributions: The case of graphite and diamond

Electron Rutherford back scattering spectroscopy with energy and angular scanning for thin oxide films diagnostics

Hydrocarbon isotope detection by elastic peak electron spectroscopy

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