Accurate experimental determination of gallium K- and L3-shell XRF fundamental parameters
| Autor: | Malte Wansleben, Burkhard Beckhoff, Matthias Müller, Rainer Unterumsberger, Philipp Hönicke, Julien L. Colaux, Chris Jeynes |
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| Rok vydání: | 2018 |
| Předmět: |
Photon
Materials science Atomic Physics (physics.atom-ph) Instrumentation 010401 analytical chemistry Analytical chemistry FOS: Physical sciences chemistry.chemical_element Synchrotron radiation Photoionization Rutherford backscattering spectrometry 01 natural sciences Fluorescence Physics - Atomic Physics 0104 chemical sciences Analytical Chemistry chemistry Yield (chemistry) 0103 physical sciences Gallium 010306 general physics Spectroscopy |
| Zdroj: | COLAUX, JULIEN, Unterumsberger, R, Hönicke, P, Jeynes, C, Wansleben, M, Müller, M & Beckhoff, B 2018, ' Accurate experimental determination of gallium K-and L3-shell XRF fundamental parameters ', Journal of Analytical Atomic Spectrometry, vol. 33, no. 6, 10.1039/c8ja00046h, pp. 1003-1013 . https://doi.org/10.1039/c8ja00046h |
| ISSN: | 1364-5544 0267-9477 |
| DOI: | 10.1039/c8ja00046h |
| Popis: | 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 consistent with existing database values(omega_Ga_K=0.515 +- 0.019, omega_Ga_L3=0.013 +- 0.001). 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 omega_Ga_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. 17 pages, 6 figures |
| Databáze: | OpenAIRE |
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