[Ifeffit] A simple question regardng the 'chi' in the xmu.dat file (FEFF8)
bruceravel1 at gmail.com
bruceravel1 at gmail.com
Fri Sep 2 18:51:14 CDT 2011
Hi Deok-Yong,
I was really hoping that someone from the Feff project would respond
to this.
I certainly agree that column 4 seems to be reported inconsistently
with columns 5 and 6. So you are correct that there seems to be a
problem with feff8.
I don't do a lot of XANES calculations these days and it has been
several years since I contributed directly to Feff. So I am not
really in a position to resolve your problem.
Hopefully one of the Seattle folk will look into this....
B
> Dear Ifeffit users:
>
> Hello, I have a simple question regarding the 'chi' in the xmu.dat, an output
> file of FEFF8. I wish I could get helps from you to resolve this.
>
> As far as I know... in the xmu.dat file from Feff6, mu=mu0*(1+'chi') as it
> should be, but in the xmu.dat file from Feff 8, the 'chi' written in the
> xmu.dat is a rescaled one by mu0/(mu0 at edge+tens eV) so that mu should be
> equal to mu0+'chi'.
>
> I checked up for FEFF8.4 by turning on and off the FMS card, and found that
> with the FMS card, mu = mu0+'chi', while without the FMS card, mu is quite
> close to or same as mu0*(1+'chi') instead of mu0+'chi'.
>
> Please help me to find which one is correct. Attached are the Feff.inp and the
> resultant xmu.dat for ZnO.
>
> Thank you all.
>
> Best Regards,
> Deok-Yong Cho
> Post-doctoral researcher at RWTH Aachen, Germany *
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--
Bruce Ravel ------------ bruceravel1 at gmail.com
Homepage --------------- http://xafs.org/BruceRavel
EXAFS software --------- http://github.com/bruceravel/demeter/
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