[Ifeffit] MBACK and Athena

Bajamundi Cyril Cyril.Bajamundi at vtt.fi
Thu Mar 7 07:46:46 CST 2013

Hello Chris,

I have short-range spectra for my standards and that I am having challenges in normalizing them.
It has been suggested before in the previous thread that MBACK, although not absolutely, "will sort of solve the problem in the sense that it offers a somewhat more stable way of dealing with short-range data" -thus this interest in normalizing the my standards spectra using MBACK.


From: ifeffit-bounces at millenia.cars.aps.anl.gov [mailto:ifeffit-bounces at millenia.cars.aps.anl.gov] On Behalf Of Christopher Patridge
Sent: Thursday, March 07, 2013 3:22 PM
To: XAFS Analysis using Ifeffit
Subject: Re: [Ifeffit] MBACK and Athena

Hello Cyril,

Is there a particular reason for moving the data to Matlab and using MBACK rather than the built-in procedure in Athena?  From your email, it seems that you have the raw data which you then merge.  I would feel confident in performing all the data processing in Athena.  Your hope in merging data is remove noise and improve the confidence that features seen in the data are real.  Someone may be able to comment on the impact of MBACK, but questions here mostly deal with ifeffit.

Good luck,



Christopher J. Patridge, PhD

NRC Post Doctoral Research Associate

Naval Research Laboratory

Washington, DC 20375

Cell: 315-529-0501
On 3/7/2013 7:10 AM, Bajamundi Cyril wrote:
[cid:image001.gif at 01CE1B4A.F709D670]

I have 3 spectra taken from a single sample, I align, merge and save the merged data as  merge.xmu file.
I then normalize this merged data using the MBACK algorithm in Matlab, the results of which is stored as merged.xmu.mnor file. This file, I then import to ATHENA using the instructions in http://www.mail-archive.com/ifeffit@millenia.cars.aps.anl.gov/msg03523.html.

I do this for all my samples and standards in order for me to perform LCF.
My questions are

1.   Is this procedure valid? In the sense that no information or features of the spectrum are lost from merge.xmu to merged.xmu.mnor file.

2.   How will the procedure <Calibrate data> affect this procedure?

Thank you for your time in answering my questions.


PS: This query is in relation to my previous question [Ifeffit] Basic question in normalization and background removal


Ifeffit mailing list

Ifeffit at millenia.cars.aps.anl.gov<mailto:Ifeffit at millenia.cars.aps.anl.gov>


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20130307/df4cde9a/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.gif
Type: image/gif
Size: 70 bytes
Desc: image001.gif
URL: <http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20130307/df4cde9a/attachment.gif>

More information about the Ifeffit mailing list