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Electron diffraction diameter measurement

  1. Jul 11, 2011 #1

    In an electron diffraction experiment usually the diffraction rings are blurred. My question. If measuring the diameter, should I measure to the inside of the ring, the outside, or take a guess where the middle of the ring is and measure to there? Thanks
  2. jcsd
  3. Jul 11, 2011 #2
    Yes, the monochromatic character of a cathodic ray is never as good as for the [itex]K\alpha[/itex] of cobalt, copper or molybdenum we use in radiocrystallography.
    We always take the middle of the ring on Debye-Scherrer films, of the spots on Laue diffractograms, the summit of the peaks on paper diffractograms.

    So guess the middle of your rings. No better way.
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