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Investigating the structure of the Tin M45N45N45 auger spectrum using auger photoelectron coincidence spectroscopy

Creagh, C.A., Thurgate, S. and Jiang, Z-T (2002) Investigating the structure of the Tin M45N45N45 auger spectrum using auger photoelectron coincidence spectroscopy. Journal of Electron Spectroscopy and Related Phenomena, 122 (2). pp. 147-156.

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Auger photoelectron coincidence spectroscopy (APECS) data were collected for the M45N45N45 Auger peak in coincidence with the 3p3/2, 3d3/2 and 3d5/2 photoelectron lines of Tin. Model spectra were created to fit the APECS data from sets of Gaussian curves defined by Parry-Jones et al., J. Phys. C: Solid State Physics, 12 (1979) 1587. These models were then combined using information about the relative intensities of the peaks from the aforementioned paper to produce a model of the Auger peak which proved a good comparison to high resolution AES spectra. The APECS data revealed satelite structure in the M5N45N45 peak in coincidence with the 3d5/2 photoelectron line (M5N45N45:3d5/2) due to the Mg Kα3 line of the X-ray source. There was evidence of a small Coster–Kronig component in the M4N45N45:3d3/2 data and the M45N45N45:3p3/2 data showed intensity in the M4N45N45 and M5N45N45 regions also arising from Coster–Kronig processes. The contribution of the M4N45N45 plasmon was included in each of the APECS models and was reflected in the high resolution AES spectra. Slight oxidation of the surface of the sample during each 24-h period produced a 0.7 eV shift of the singles Auger peak to lower kinetic energies. The shift was not reflected in the coincidence peak which produced a spectrum of a clean surface due to the nature of the coincidence experiment.

Item Type: Journal Article
Murdoch Affiliation: School of Engineering and Energy
Publisher: Elsevier
Copyright: 2002 Elsevier Science B.V.
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