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Electron

  Kikuchi Lines - 1     5 of 8
 
Conventional high energy electron diffraction relies on elastic scattering. However, in a thick enough specimen, inelastic scattering will also take place. Inelastically scattered electrons travel in all directions but their distribution peaks in a forward direction.

Have a go imageCheck this out for yourself by repeating the simulation on the right a few times.  Note that in reality, the scattering is occurring in 3 dimensions.
Diffraction image More electrons are scattered forward than sideways. This contributes a grey background around the central spot of the diffraction pattern, as shown here.

On the next page, we will see the importance of two particular sets of inelastically scattered electrons.

 

 
 

 Introduction  | Geometry | Intensity | X-ray Diffraction | Electron Diffraction 

 
 

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