[Ifeffit] multiple k-weights refinments

[Matt Newville]

Hi Marie,


On 4/13/07, marie-helene.tuilier at uha.fr <marie-helene.tuilier at uha.fr> wrote:
>
> I try  multiple k-weights refinments with ARTEMIS of Al K EXAFS of ternary
> aluminium and titanium nitrides films.
> This system is rather disordered and textured with large grain boundaries
> that contribute to EXAFS. Consequently only few parameters can be varied
> simultaneously.
> I think  that the k**3 weighting plays the major role in the multiple
> k-weights calculation.
> There is no great dfference between the results of k**3 weight and multiple
> k-weights fits.

Hmm, there should be some difference, though it's certainly possible
that the differences would be small.    I would expect N, Al, and Ti
scatterers to have different importance in k^1, k^2, and k^3
weighting.

To say much more would depend on the details of your data --
especially the k and R ranges used in the fit.  Perhaps posting a
project file would clarify the issues?

--Matt