Publikationen

New fluoride target matrix preparation procedure for determination of <sup>236</sup>U with accelerator mass spectrometry

Autor(en)
T. Prášek, M. Němec, P. Steier, M. Kern, M. Honda, K. Hain, X. Zhang
Abstrakt

In recent years, radionuclide 236U has become a valuable analytical tool covering a wide area of applications, including overall monitoring of environmental radioactive contamination for nuclear safeguards purposes, forensic analyses, tracing of various natural processes, e.g. ocean currents, soil erosion and others. Due to low concentrations of 236U in environmental samples, highly sensitive mass spectrometric methods as ICP-MS and AMS require to be applied in related analyses. AMS measurements usually utilize target samples with uranium converted to a form of oxide incorporated in iron(III) oxide (Fe2O3) carrier matrix. Alternatively, fluoride target matrices, uranium tetrafluoride (UF4) in particular, have been studied as a promising alternative, providing significantly higher ion currents at a simultaneous reduction of occurring interferences by replacement of oxygen with monoisotopic fluorine 19F. Despite these advantages, application of fluoride target matrices in routine analytical process still faces several major problems regarding the preparation of pure, anhydrous uranium tetrafluoride as well as the continuity of preparation procedures with preceding sample treatment, which demand further modifications. In this respect, a new fluoride target matrix preparation method has been proposed, more suitable for determination of 236U in natural samples. Applicability of the procedure has been demonstrated on a series of target samples analysed at VERA AMS laboratory, University of Vienna.

Organisation(en)
Isotopenphysik
Externe Organisation(en)
Czech Technical University in Prague (CTU), Universität Wien
Journal
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Band
472
Seiten
64-71
Anzahl der Seiten
8
ISSN
0168-583X
DOI
https://doi.org/10.1016/j.nimb.2020.03.029
Publikationsdatum
06-2020
Peer-reviewed
Ja
ÖFOS 2012
103014 Kernphysik, 105904 Umweltforschung
Schlagwörter
ASJC Scopus Sachgebiete
Nuclear and High Energy Physics, Instrumentation
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/new-fluoride-target-matrix-preparation-procedure-for-determination-of-236u-with-accelerator-mass-spectrometry(707c00b7-f290-447c-b5cc-652ea09743e3).html