[phenixbb] anomalous signal
tg at shelx.uni-ac.gwdg.de
Mon Oct 20 10:10:22 PDT 2014
you are right, the absolute value contains the contribution from all
absorbing elements. The edge can be determined reliably, though, because
it is not shifted with respect to the energy (by this effect), only with
respect to the amplitude.
On 10/20/2014 02:44 PM, Matteo Colombo wrote:
> I was wondering if the f'' determined by XANES experiment is
> quantitatively significant and if it can be contributed by two different
> anomalous scatterers.
> For example in my protein I know that Co and Zn are present. In theory,
> at Zn absorption edge, I have a contribution from Co too. If I perform a
> XANES experiment to determine Zn absorption edge and I obtain a f'' of
> 5.87, does this value correspond to only Zn signal or to a sum of Zn+Co?
> Thanks a lot
Dr Tim Gruene
Institut fuer anorganische Chemie
GPG Key ID = A46BEE1A
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