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High energy resolution five-crystal spectrometer for high quality fluorescence and absorption measurements on an x-ray absorption spectroscopy beamline
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10.1063/1.4728414
/content/aip/journal/rsi/83/6/10.1063/1.4728414
http://aip.metastore.ingenta.com/content/aip/journal/rsi/83/6/10.1063/1.4728414

Figures

Image of FIG. 1.
FIG. 1.

Schematic view of CRG BM30B/CRG-FAME beamline at the European Synchrotron Radiation Facility in Grenoble (France).

Image of FIG. 2.
FIG. 2.

Influence of scattered beams on x-ray fluorescence emission spectra collected using the CANBERRA 30-elements SSD for bromide aqueous solutions at different concentrations.

Image of FIG. 3.
FIG. 3.

Visualisation of the intersection between the incident beam and the detection cone and resolution effect – vertical spreading of the focal spot on the detector.

Image of FIG. 4.
FIG. 4.

View of the spectrometer: detail of crystal assemblage (left—top position), view of the spectrometer on the beamline with the Vortex EX-90 as detector (left—down position), and top-view of a spectrometer drawing (right).

Image of FIG. 5.
FIG. 5.

Co K-edge XANES of Co adsorbed on ferrihydrite collected in total fluorescence yield using a solid state detector (SSD) and in high energy resolution fluorescence detected using the crystal analyzer spectrometer (CAS). Integrated counts after edge are ∼5 × 105 using SSD and ∼4 × 104 using CAS for counting times of 6 s and 120 s, respectively.

Image of FIG. 6.
FIG. 6.

Normalized Sr K-edge XANES spectra collected in total fluorescence (SSD) and HERDF mode (CAS) on a crystalline UO2 sample doped with 1400 ppm Sr. The arrows signal parasite effects due to Bragg peaks from UO2 matrix.

Image of FIG. 7.
FIG. 7.

Fluorescence spectra measured using the high resolution crystal analyzer spectrometer (top) and the 30-element solid state detector (bottom) on Co adsorbed on nano-γFe2O3.

Image of FIG. 8.
FIG. 8.

Comparison of the CAS with 13-element and 30-element SSD to determine which is the more appropriate in the case of Co adsorbed on iron sample.

Tables

Generic image for table
Table I.

Technical parameters of the spectrometer.

Generic image for table
Table II.

Experimental and theoretical resolutions for HERDF-XAS experiments.

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/content/aip/journal/rsi/83/6/10.1063/1.4728414
2012-06-12
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High energy resolution five-crystal spectrometer for high quality fluorescence and absorption measurements on an x-ray absorption spectroscopy beamline
http://aip.metastore.ingenta.com/content/aip/journal/rsi/83/6/10.1063/1.4728414
10.1063/1.4728414
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