Electron microscopy
 
Electron Diffraction Pattern Depending on Electron Wavelength/Voltage
- Practical Electron Microscopy and Database -
- An Online Book -
Microanalysis | EM Book                                                                                   http://www.globalsino.com/EM/        

=================================================================================

 

In electron diffraction, since the radius of the Ewald sphere increases with decreasing electron wavelength λ, the value of G of a diffraction spot for any given orientation will increase as the accelerating voltage is increased. Therefore, it becomes difficult to observe the diffraction spots with high H K L values and the HOLZ rings at low or intermediate voltages.

 

 

=================================================================================