Hi Tien: The transmission data is always sloping down because the absorption coefficient, which is being measured in absolute terms by transmission, varies as E^-3 except where there is an edge jump. Therefore you should see that downward slope in transmission if you have measured it correctly.
The fluorescence measurement is not giving you the absolute absorption but something which should be proportional to it. the slope of that baseline very much depends on the details of the sample and the detector. Carlo On Thu, Jul 1, 2021 at 5:59 AM Tien Neng-Chuan <tien.nengch...@gmail.com> wrote: > Thank you very much > > Mangold, Stefan (IPS) <stefan.mang...@kit.edu> 於 2021年7月1日 下午5:05 寫道： > > > the plot from researchgate is transmission data, your data is > fluorescence; > > best regards > > Stefan Mangold > > Am 01.07.2021 um 10:17 schrieb 田能全 <tien.nengch...@gmail.com>: > > Hi Stefan, > Thanks for the response. I am confusing about the two plots. Could you > please explain more about the difference? > > <image.png> > https://www.researchgate.net/publication/231097049_Cs_L-edge_EXAFS_atomic_absorption_background/figures?lo=1 > > > > <image.png> > > > Kind regards, > > N. C. Tien > > > > Mangold, Stefan (IPS) <stefan.mang...@kit.edu> 於 2021年7月1日 週四 下午3:38寫道： > >> normal for every element, >> >> the higher the energy, the larger is the penetration depth — >> >> regards >> >> Stefan Mangold >> >> Am 01.07.2021 um 06:13 schrieb 田能全 <tien.nengch...@gmail.com>: >> >> >> Hi everyone, >> My colleague sent me data of liquid CsNO3 sample measured using >> fluorescence model. According to the attached figure, I don't understand >> why mu(E) increased with increasing energy before and after the L3 edge. >> Does it make sense for cesium? Thanks. >> >> Nengchuan >> <image.png> >> _______________________________________________ >> 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 >> >> >> _______________________________________________ >> 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 >> > > _______________________________________________ > 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 -- 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 se...@iit.edu http://phys.iit.edu/~segre se...@debian.org
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