[Ifeffit] Projekt with the "flatten-problem"

[Kelly, Shelly D.]

Hi Jens,

I believe the problem is related to the structure in the data before E0.
If you choose e0 to be at the beginning of the structure then the
normalization is handled better by Athena.  Take a look at the attached
project file.  The first data set with e0 on the edge as you would
choose for EXAFS analysis (e1) shows the error that Jens reported.  The
second data set with a lower value for e0 at the beginning of the
structure (e2) gets the job done.

Cheers,
Shelly

---------------------------
Shelly Kelly
Argonne National Laboratory
Bldg 203, RM E113
9700 S. Cass Ave
Argonne, IL 60439

Molecular Environmental Science Group
www.mesg.anl.gov
skelly at anl.gov
phone: 630-252-7376


> -----Original Message-----
> From: ifeffit-bounces at millenia.cars.aps.anl.gov [mailto:ifeffit-
> bounces at millenia.cars.aps.anl.gov] On Behalf Of Jens Kruse
> Sent: Thursday, January 11, 2007 2:38 AM
> To: Athena mailing List
> Subject: [Ifeffit] Projekt with the "flatten-problem"
> 
> Hi,
> 
> find attached an example with the "flatten-problem".
> thanks a lot,
> 
> jens
> 
> 
> 
> 
> "Hi,
> 
> I have a normalization problem with Athena. If I turn on the "flatten"
> option in the background removal section, Athena creates in some of
the
> normalized spectra a step in the pre-edge range.  How can I  get rid
of
> it?
> 
> Thanks,
> 
> jens"
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Flatten.prj
Type: application/octet-stream
Size: 10996 bytes
Desc: Flatten.prj
URL: <http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20070111/ce801acc/attachment.obj>