Re: [Ifeffit] [Ext] Deglitch the data

Agree. Took a quick look at your spectrum. The IrOx seems to be extremely amorphous without much Ir-Ir interactions. The dip is around 11 (A-1) in the k-space. So you may just truncate anything beyond that dip and the remaining spectrum should carry most useful information and be fitable, at least for the first shell Ir-O bond. On Sun, Jul 16, 2023 at 11:13 PM Carlo Segre wrote:

Hi Kavya:

What you have are not glitches but shifts in the absolute absorption probably due to bubbles or droplets moving through the beam. You can tell these from crystal glitches because the glitches are sharp and occur at the same energy in every scan while these are likely to move around from scan to scan. In my experience, this kind of change in the spectrum is not correctable. Hopefully you have lots of scans and only some of them have these artifacts and can be thrown out.

Carlo

On Sun, Jul 16, 2023 at 10:00 PM Shailendra wrote:

...

Hi, IFEFFIT community,

I am Rachna, a Ph.D. student working on IrO2 based OER catalyst. I am a new XAS user. Recently, we recorded some XAS on amorphous IrO2 electrode samples however some of the samples show a dip in adsorption at high energy. The glitches are similar to the one in the attached photo. I am attaching the Athena file for the measurements too. I was wondering if there is a way to remove such glitches. I would greatly appreciate any tips or tricks you may have for dealing with this situation.

Thanks, Kavya Rachna _______________________________________________ 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

-- Carlo U. Segre (he/him) -- Duchossois Leadership Professor of Physics Professor of Materials Science & Engineering Director, Center for Synchrotron Radiation Research and Instrumentation Illinois Institute of Technology Voice: 312.567.3498 Fax: 312.567.3494 segre@iit.edu http://phys.iit.edu/~segre segre@debian.org

_______________________________________________ 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