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XAFS data collection: an integrated approach to delivering good data

DOI: 10.1107/S090904951203854X DOI Help
PMID: 23093743 PMID Help

Authors: Sofia Diaz-moreno (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Synchrotron Radiation , VOL 19 (6) , PAGES 863 - 868

State: Published (Approved)
Published: November 2012

Abstract: Energy scale calibration and reliable intensity measurement are the main issues related to the collection of good spectroscopy data. The accurate determination of the energy scale is often established by using foils of optimum thickness to calibrate the monochromator. However, mechanical issues with the monochromator, movement of the source, or even the resolution of the spectrometer can have an effect on the measured energy scale. For the issue of accurate intensity measurements, calibrated detectors are necessary to ensure a reliable measurement of the spectroscopic signal, both in transmission and fluorescence detection modes. In this paper a review of the most common techniques used for energy calibration and for collecting X-ray absorption spectroscopy data is given, together with a brief description of the factors that have an impact on the intensity of the measured signal. A brief description of the versatile X-ray absorption spectroscopy beamline, I20, at Diamond Light Source is also presented, giving particular emphasis on how the beamline design has been undertaken to tackle these key issues. In particular, the use of a four-bounce monochromator will be discussed, highlighting the advantages of the device for the measurement of spectroscopy data.

Journal Keywords: Xafs; Energy Calibration; Intensity Calibration; Four Bounce Monochromator

Subject Areas: Technique Development


Instruments: I18-Microfocus Spectroscopy , I20-Scanning-X-ray spectroscopy (XAS/XES)

Added On: 02/11/2012 16:53

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