Properties of Ewald and Darwin curves


Both Ewald and


Darwin curves

have a horizontal plateau with a total width .


The FWHM, the convolution factors and the integrated intensity of both curves in units of are given by:

  Ewald curve Darwin curve
Convolution factor f
Integrated intensity

The convolution factor f is defined here by the FWHM of the respective curve convoluted with itself. For the sake of simplicity we have neglected these factors in the the description of the theory.