[Ifeffit] Distance dependent phases and amplitudes

[Hugo Carabineiro]

Hi,

I've never quite well understood why do theoretical phases and amplitudes
seem to be  dependent on the interatomic distance between the absorber and
scatterer atoms. Shouldn't it only depend on the nature of the atoms
involved? Nevertheless when trying to build theoretical references I'm
always careful in choosing an appropriate distance. Otherwise the difference
in phase shifts must be compensated at the expense of large E0 values.
Could someone please shead more light on this subject?

Thanks,
Hugo Carabineiro
PhD Student