Issue 3, 2002
From the journal:

Journal of Analytical Atomic Spectrometry

L. Vincze,a   F. Wei,a   K. Proost,a   B. Vekemans,a   K. Janssens,a   Y. He,b   Y. Yanb  and  G. Falkenbergc  

a Department of Chemistry, University of Antwerp (UIA), Universiteitsplein 1, Antwerpen, Belgium

b Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875, P.R.China

c HASYLAB, DESY, Hamburg, Germany

Abstract

In this study a monolithic polycapillary half-lens was evaluated as a micro-focusing device for monochromatic synchrotron radiation. The tested optic produced an X-ray micro-beam of 37–53 microns in the energy range of 6–19 keV with a maximum intensity gain of about 600 with respect to the primary beam. When applied to X-ray fluorescence (XRF) analysis, absolute detection limits in the range of 0.06–1 pg were measured, coupled with relative detection limits of 0.3–200 ppm for the atomic number range of 20–40. The use of the polycapillary lens was demonstrated by performing microscopic X-ray absorption near edge structure (XANES) measurements in fluorescence mode on transition metals (concentration range 40–100 ppm) in fly ash particles.

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Article information

DOI
https://doi.org/10.1039/B110210A
Article type
Paper
Submitted
08 Nov 2001
Accepted
02 Jan 2002
First published
24 Jan 2002

J. Anal. At. Spectrom., 2002,17, 177-182

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Suitability of polycapillary optics for focusing of monochromatic synchrotron radiation as used in trace level micro-XANES measurements

L. Vincze, F. Wei, K. Proost, B. Vekemans, K. Janssens, Y. He, Y. Yan and G. Falkenberg, J. Anal. At. Spectrom., 2002, 17, 177 DOI: 10.1039/B110210A

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