Hi Weronika,

I think that the problem is due to the fact that the data file stores data in keV so that the small increments in energy at the pre-edge look like very, very small changes if the energy is assumed to be in eV. So, I think you may just need to specify that the data has energy units of keV rather than eV.

When I read your Fe_Kedge_falconX.... file into XAS Viewer, I also had to tell it that it was XAS data in keV, but then it read in just fine. If I zoom in on the pre-edge peaks it shows:

I think that agrees with what you see.

On Mon, Jun 27, 2022 at 8:40 PM Ofierska Weronika Lucja <weronika.ofierska@erdw.ethz.ch> wrote:

Dear all,

I am a new user of Athena and encountered some issues with data plotting.

While plotting the uXAS data for Fe K pre-edge the quality of plotting is somehow less sharp compared to the actual data I plotted using other graphical tool (see below)

vs what I get from Athena

As you can see the resolution of the pre-edge in Athena is so poor I cannot resolve the Fe2+/Fe3+ ratio as the peak for Fe3+ is not visible. (I plotted Bruce's data from lepidocrocite to see if it's a common problem and it seems that his data look much better than mine). During my time on synchrotron we actually spent a lot of time to resolve best resolution on the pre edge, so it's not a acquisition problem.

Does anyone have any idea how to fix this?

I am attaching the project file and txt file (plot FluoRT2 column) with the original data.

Thank you for your help,

Weronika Ofierska

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