Disk Size/Radius in CBED
- Practical Electron Microscopy and Database -
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The disk diameter (size) in CBED is related to the convergence angle (α) for forming the patterns. In other words, the diameter (d) of the bright-field disk in Figure 1991 is a function of the α and the wavelength (λ), given by,

       d = 2α/λ ---------------------- [1991]

CBED disk diameter

Figure 1991. CBED disk diameter.

 

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