Dear A,

I think you are trying to fit a peak which shouldn't be there. If you call 1.8 to 3.5 higher R space I think you are trying to fit an artifact of the FT. You should try and go back to the background subtraction etc. 

Cheers,
Edmund


----- Original Message -----
From: "XAFS Analysis using Ifeffit" <ifeffit@millenia.cars.aps.anl.gov>
To: "XAFS Analysis using Ifeffit" <ifeffit@millenia.cars.aps.anl.gov>
Cc: avijay@ethz.ch
Sent: Thursday, February 13, 2025 3:45:52 PM
Subject: [Ifeffit] Re: Artemis: Rejects first shell fitting

Hello!

I was trying to fit the Sn foil reference .

As a side note, I did check another literature (DOI 10.1149/2.0091412jss) who also fit the data between higher R space: 1.8 and 3.0 (3.5) Å, which I think is similar to my attempt at the fitting where the Sn1.1 and Sn1.2 at lower R were excluded from the fit to get a meaningful value of the parameters of the fit.

I appreciate the help!

Best,
A
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