Dear Matt and Carlo and Liam,
I agree with Matt and Carlo that phase corrected plots are not a great idea, I think they lead people to forget that they are not looking at a radial distribution function and encourages people to think they can read distances off a plot of the amplitude of the FT of overlapping sine waves reliably. Thanks Fred J F W Mosselmans Principal Beamline Scientist I20 Diamond Light Source Harwell Campus Didcot OX11 0DE 01235 778568 fred.mosselm...@diamond.ac.uk 07419362123 Message: 1 Date: Tue, 13 Dec 2022 16:53:03 -0600 From: Matt Newville <newvi...@cars.uchicago.edu> To: XAFS Analysis using Ifeffit <ifeffit@millenia.cars.aps.anl.gov> Subject: Re: [Ifeffit] Plotting chi(R) from FEFF in XAS Viewer (Larch) with phase correction Message-ID: <ca+7esbr+dct8hfwntm2t+tonyhqw4iqwfbbbjoecn4ese+i...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Hi Liam, Yes, this is not currently available. It would not be hard to enable, but I am not sure it is a great thing to do. I admit that I sort of find that phase-correction plots need a lot of explanation, and so are prone to causing confusion. They might be useful for Pt metal, but they cannot really be correct for multi-atomic systems. Well, I guess "correct" is not the only consideration ;). I guess I would ask if there are suggestions and input from people teaching XAFS on whether phase corrections (and probably a handful of other "tricks" or analysis variations) are actually useful or just confusing. On Tue, Dec 13, 2022 at 7:58 AM Liam Nagle-Cocco <la...@cam.ac.uk> wrote: > Dear all, > > In Artemis it is possible to plot chi(R) for FEFF-fit, with the phase > corrected - i.e. bond length corrected for deltaR. This is shown in > this screenshot below ("Use this path for phase corrected plotting"). > Is this possible in XAS Viewer? > > > Liam Nagle-Cocco *(he/his)* > > PhD Student in Condensed Matter Physics | Cavendish Laboratory > > Welfare Officer 2022-2023 | Jesus College MCR > _______________________________________________ > Ifeffit mailing list > Ifeffit@millenia.cars.aps.anl.gov > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit > -- --Matt Newville <newville at cars.uchicago.edu> 630-327-7411 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20221213/6c73315e/attachment.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: image.png Type: image/png Size: 53771 bytes Desc: not available URL: <http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20221213/6c73315e/attachment.png> ------------------------------ Subject: Digest Footer _______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit ------------------------------ End of Ifeffit Digest, Vol 238, Issue 13 **************************************** -- This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail. Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd. Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message. Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom _______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit