Some problems of electron spectroscopy (AES, EPES) using a retarding field analyser

A. Sulyok, G. Gergely, B. Gruzza, L. Bideux

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The retarding field analyser (RFA) proved to be advantageous in electron spectroscopy due to its high luminosity and by providing LEED simultaneously with AES and EPES. RFA is very efficient for determining the inelastic mean free path of electrons by EPES. Doliński et al measured the elastic peak by repelling the electron beam using a bias potential on the sample. In this paper a further development of this procedure is described supplying the true percentage of elastically scattered electrons collected by RFA. The percentage has been determined by our RFA with optimized bias potential of the sample for primary energies between 100 and 2000 eV. It was deduced from the high energy side of the elastic peak because the background affects the detected signal on the low energy side. The experimental curve of elastic reflection coefficient is presented for indium. The measured elastic peak is distorted by the analyser. The spectrometer response of an RFA was determined by analysing the peak shape of deflected electrons after optimization of the bias voltage of the sample. The peak shape shows asymmetry since the low energy side differs from the Gaussian like high energy side. The distortion produced by RFA is similar to that observed by Taylor. It is enhanced by the background adjacent to the elastic peak. A computer algorithm was elaborated for reconstruction of the elastic and Auger peaks. Corrected curve is presented for indium Auger peak.

Original languageEnglish
Pages (from-to)325-327
Number of pages3
JournalVacuum
Volume45
Issue number2-3
DOIs
Publication statusPublished - Jan 1 1994

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ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films

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