Measurements of ionization cross-section for electron energy-loss microanalysis under well defined scattering conditions

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Partial cross-sections required for electron energy-loss microanalysis have been measured for a series of high purity single crystal standards. For each sample four different scattering geometries were used. The experimental data were compared with theoretical calculations using both standard hydrogenic model and parametrized Hartree-Slater cross-sections. Best agreement between theory and experiment were observed for experiments performed in diffraction mode (image coupling) with the probe convergence angle (0. 84 mrad) much smaller than the spectrometer collection angle (6.84 mrad). In addition, specimen thicknesses from the region of microanalysis were measured by convergent beam electron diffraction. Absolute cross-section based on these measurements … continued below

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Krishnan, K.M. & Echer, C.J. April 1, 1991.

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Partial cross-sections required for electron energy-loss microanalysis have been measured for a series of high purity single crystal standards. For each sample four different scattering geometries were used. The experimental data were compared with theoretical calculations using both standard hydrogenic model and parametrized Hartree-Slater cross-sections. Best agreement between theory and experiment were observed for experiments performed in diffraction mode (image coupling) with the probe convergence angle (0. 84 mrad) much smaller than the spectrometer collection angle (6.84 mrad). In addition, specimen thicknesses from the region of microanalysis were measured by convergent beam electron diffraction. Absolute cross-section based on these measurements are also currently being determined. 10 refs., 2 figs.

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9 pages

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OSTI; NTIS; INIS; GPO Dep.

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  • 49. Electron Microscopy Society of America (EMSA) annual meeting, San Jose, CA (USA), 4-9 Aug 1991

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  • Other: DE91013745
  • Report No.: LBL-30618
  • Report No.: CONF-910870--16
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 5755902
  • Archival Resource Key: ark:/67531/metadc1100723

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  • April 1, 1991

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Krishnan, K.M. & Echer, C.J. Measurements of ionization cross-section for electron energy-loss microanalysis under well defined scattering conditions, article, April 1, 1991; [Berkeley,] California. (https://digital.library.unt.edu/ark:/67531/metadc1100723/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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