Electron diffraction diameter measurement

  • #1
Hello

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
 

Answers and Replies

  • #2
81
0
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?

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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