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

Unterumsberger, R, Hönicke, P, Colaux, Julien, Jeynes, Christopher, Wansleben, M, Müller, M and Beckhoff, B (2018) Accurate experimental determination of Gallium K- and L3-shell XRF fundamental parameters Journal of Analytical Atomic Spectrometry, 33. pp. 1003-1013.

PTB+UoS_Ga-FPs_final_accepted_UoS.pdf - Accepted version Manuscript

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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.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Unterumsberger, R
Hönicke, P
Wansleben, M
Müller, M
Beckhoff, B
Date : 7 May 2018
DOI : 10.1039/C8JA00046H
Copyright Disclaimer : Copyright 2018 Royal Society of Chemistry
Depositing User : Melanie Hughes
Date Deposited : 17 May 2018 08:21
Last Modified : 07 May 2019 02:08

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