COLD ALCHEMI: IMPURITY ATOM SITE LOCATION AND THE TEMPERATURE DEPENDENCE OF DECHANNELLING.

John Spence, R. J. Graham, D. Shindo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations

Abstract

Recent applications of the 'Atom Location by Channelling Enhanced Microanalysis' (ALCHEMI) are summarised. This is a quantitative method for determining the sites of impurity atoms in crystals using an electron microscope and X-ray analysis system. Since the fractional site occupancies are given in terms of measured X-ray counts alone, it involves no adjustable parameters. New experiments have been performed on the temperature dependence of characteristic X-ray production under channelling conditions for InP and GaAs. We conclude that low temperatures will give more accurate results for 'ALCHEMI' in some materials due to the reduction in diffuse inelastic phonon scattering, and that the study of this temperature dependence may provide new information from small areas or particles on the correlations amongst atom motions due to thermal vibration.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposia Proceedings
PublisherMaterials Research Soc
Pages153-162
Number of pages10
ISBN (Print)0931837278
StatePublished - Dec 1 1986

Publication series

NameMaterials Research Society Symposia Proceedings
Volume62
ISSN (Print)0272-9172

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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