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Issue 6, 2018
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Accurate experimental determination of gallium K- and L3-shell XRF fundamental parameters

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Abstract

The fluorescence yield of the K- and L3-shell of gallium was determined using the radiometrically calibrated (reference-free) X-ray fluorescence instrumentation at the BESSY II synchrotron radiation facility. Simultaneous transmission and fluorescence signals from GaSe foils were obtained, resulting in K- and L3-shell fluorescence yield values (ωGa,K = 0.515 ± 0.019, ωGa,L3 = 0.013 ± 0.001) consistent with existing database values. For the first time, these standard combined uncertainties are obtained from a properly constructed Uncertainty budget. These K-shell fluorescence yield values support Bambynek's semi-empirical compilation from 1972: these and other measurements yield a combined recommended value of ωGa,K = 0.514 ± 0.010. Using the measured fluorescence yields together with production yields from reference Ga-implanted samples where the quantity of implanted Ga was determined at 1.3% traceable accuracy by Rutherford backscattering spectrometry, the K-shell and L3-subshell photoionization cross sections at selected incident photon energies were also determined and compared critically with the standard databases.

Graphical abstract: Accurate experimental determination of gallium K- and L3-shell XRF fundamental parameters

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Article information


Submitted
14 Feb 2018
Accepted
01 May 2018
First published
07 May 2018

J. Anal. At. Spectrom., 2018,33, 1003-1013
Article type
Paper

Accurate experimental determination of gallium K- and L3-shell XRF fundamental parameters

R. Unterumsberger, P. Hönicke, J. L. Colaux, C. Jeynes, M. Wansleben, M. Müller and B. Beckhoff, J. Anal. At. Spectrom., 2018, 33, 1003
DOI: 10.1039/C8JA00046H

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