You are
welcome to download a program to calculate f’(E) as a function of f’’(E) on
this link:
The
program can be used to calculate your atomic scattering factors as a function
of the x-ray energy.
As
an input file you have to supply the data for f’’(E). f’’ should be measured
for the energy range you are
using
in your experiment, i.e. around the absorption edge where you tend to perform
anomalous scattering.
For
the remaining energy spectrum tabulated values (see here) are
sufficient. It is not a question of whether
or
not you trust in these tables, but it is always recommended to use values
measured with your experimental setup
in
the vicinity of the absorption edge you are working with. They will
intrinsically contain the monochromator
resolution
as well as the influence of the chemical environment and the oxidation state of
your sample.
Create your input file as told in the program by fitting the experimental data in the vicinity of the edge to
the tabulated values before and after the edge.
Get
example file for Germanium
here