skip to main content

Title: Combined study of the ground and unoccupied electronic states of graphite by electron energy-loss spectroscopy

Both the unoccupied and ground electronic states of graphite have been studied by electron energy-loss spectroscopy in a transmission electron microscope. Electron energy-loss near-edge structures of the K-edge of carbon have been investigated in detail for scattering angles from 0 to 2.8 mrad. The π{sup *} and σ{sup *} components were separated. The angular and energy dependences of the π{sup *} and σ{sup *} structures were in fair agreement with theory. Electron energy loss Compton spectra of graphite were recorded at scattering angles from 45 to 68 mrad. One Compton scattering spectrum was obtained in 1 min compared with several hours or days using photons. The contributions of core electrons were calculated by the exact Hartree-Slater method in the Compton scattering region. The electron Compton profile for graphite is in good agreement with other conventional Compton profile measurements, as well as with theory, thus establishing the validity of the technique.
Authors:
 [1] ;  [2] ;  [1] ; ;  [3] ;  [4] ;  [1] ;  [5]
  1. University Service Center for Transmission Electron Microscopy, Vienna University of Technology, A-1040 Vienna (Austria)
  2. (China)
  3. Department of Physics, University of Vienna, 1090 Vienna (Austria)
  4. Shenyang National Laboratory of Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang (China)
  5. (Austria)
Publication Date:
OSTI Identifier:
22257772
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 18; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPTON EFFECT; ENERGY DEPENDENCE; ENERGY LOSSES; ENERGY-LOSS SPECTROSCOPY; GRAPHITE; PHOTONS; SLATER METHOD; SPECTRA; TRANSMISSION ELECTRON MICROSCOPY