May 2025 - Ifeffit - millenia.cars.aps.anl.gov

Problem installing Demeter
by Amy Shober 30 May '26

30 May '26

Hi all, I had to have my IT folks completely wipe my computer. They updated me to Windows 11 enterprise edition. I previously had Demeter installed so that I could use Athena. We were able to download the Demeter Version 0.9.26 installation package. However, it did not actually install the programs on my computer. And in the folder DemeterPerl, the only application I can launch is "unisn000". I see an icon for Demeter (ICO file) but when I click it, I only see a little thumbnail image. I'm guessing this is an icon file. Can someone help? Amy -- Amy L. Shober, Ph.D. Professor and Extension Specialist - Nutrient Management and Environmental Quality *Associate Chair - Department of Plant and Soil Sciences* 531 South College Avenue 152 Townsend Hall University of Delaware Newark, DE 19716 Phone: (302) 831-2146 Fax: (302) 831-0605 Email: ashober(a)udel.edu Website: https://urldefense.us/v3/__http://sites.udel.edu/canr-nmeq/__;!!G_uCfscf7eW…

3 2

Query: abnormal FT-EXAFS peak at ~1.1A
by Huaming 24 Dec '25

24 Dec '25

Hello! I faced an issue with fitting of FT-EXAFS data (Rh@zeolite) with Artemis. There is one distinct peak located at ~1.1 angstron. The intensity is comparable to the nearby peak of Rh-O scattering. I wonder the peak (~1.1A) is a real peak or just noise. Raw data is enclosed. Another question is why S02 can be negative in data fitting with Artemis. Cheers, Huaming

3 2

Question about Air sensitive sample holder
by Helen Chen 05 Jun '25

05 Jun '25

Hello, Our group (Jerry Seidler) just started a project involving doing VTC and HERFD on Yb doped CrX3 material. They are thin small crystal sheets and are very air sensitive. We have tried encapsulated them between a layer of laptop tape and film, but after 12hr we see degradation due to air leaks. I am looking for some advice on air sensitive sample holder. What are some typical methods you use to deal with air sensitivity, especially for samples in thin sheets geometry? Thank you

8 8

Influit Energy - Materials Scientist - X-ray Characterization Specialist
by Carlo Segre 03 Jun '25

03 Jun '25

Influit Energy is a dynamic and rapidly expanding company, developing energy storage solutions through cutting-edge research in battery technology, nanomaterials, and materials science. Please see the job posting at Influit Eneergy - Materials Scientist Position <https://urldefense.us/v3/__https://jobs.gusto.com/postings/influit-energy-i… > -- Carlo U. Segre, CTO Influit Energy, LLC 2312 W. Warren Blvd. Chicago, IL 60612

2 2

Larch 2025.2.0
by Matt Newville 27 May '25

27 May '25

Hi Folks, Larch 2025.2.0 has been released, with many fixes and improvements in the past few months, especially for the Larix GUI application. When running Larix, you should be prompted to run the "Update Larch" program. Some of the changes for this release include: - The Plotting section for the XAS Normalization panel has changed to give fewer "main plotting options", but then additional options for pre-edge lines, derivatives, etc. - The Plotting section for the EXAFS panel has also changed. Here, the choices for what to plot are now organized by "Space": Energy, k (including filtered or q), and R. Because there are many choices for making 2 plots at a time, the options can be saved and recalled later (including in later sessions). - There are several improvements for reading and showing non-XAS or "XY data". - There is an initial working version of a generic Curve Fitting Panel for XY and XAS data. This is similar to the Pre-edge Peak Fitting Panel, but it does not require the removal of a baseline first. - There is now an "XAS Mode" selection when importing data from plain Column Files. Currently, the choices are "Unknown", "Transmission", "Fluorescence", "HERFD", and "Calculation". The intent is to allow adjusting normalization and analysis parameters based on this Mode. Currently, only "Calculation" actually adjusts the normalization parameters. - Reading in XAS calculations from Feff (xmu.dat) or FDMNES with "Mode=Calculation" gives better pre-edge (using only the first point) and normalization. There are many more bug fixes and improvements detailed at See https://urldefense.us/v3/__https://github.com/xraypy/xraylarch/releases/tag… . There are plenty of people to thank for these fixes, but special thanks again goes to Mauro Rovezzi and Shelly Kelly. --Matt PS: We have missed a few recent Developers+Interested Users meetings. I think we should get back to having these, but maybe at a different pace. If anybody would like to discuss development or features in more detail, let me know.

1 0