[Ifeffit] Normalization in Athena

[Kelly, Shelly]

Hi Lisa,

Be sure that Athena has been rigorously tested and she does know how to
normalize data. It is much more likely that the default values are not
the "best" ones for your data.

My book chapter goes over how Athena normalizes data in detail.  If you
send me your email address I'll send you a copy. In particular see
figure 14-16.

Cheers,
Shelly
dr.sdkelly at gmail.com


> -----Original Message-----
> From: ifeffit-bounces at millenia.cars.aps.anl.gov [mailto:ifeffit-
> bounces at millenia.cars.aps.anl.gov] On Behalf Of Gudrun Bovenkamp
> Sent: Monday, October 26, 2009 8:42 AM
> To: ifeffit at millenia.cars.aps.anl.gov
> Subject: [Ifeffit] Normalization in Athena
> 
> Hey everybody,
> 
> while I try to figure what effect normalization has on Linear
> combination fitting in my lead L3 edge XANES system, I came accross
> this problem:
> Athena does not normalize correctly:
> 
> Normalization in Athena (post-edge): using 1.order normalization, no
> flattening (which in this case is irrelevant anyway), points +199 eV
> and +200 eV above E0.
> 
> Normalization in Origin (post-edge): using point 13235 eV (+200 eV
> above E0); dividing the spectrum column by that value.
> 
> See the two examples in the attachment.
> 
> In both examples the normalized spectrum imported from Athena does not
> have the norm value of 1 at 13235 eV. Why is that? The offset is also
> not the same for every spectrum. That undoes the normalization
> routine.
> 
> Greetings,
> Lisa