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Developing Accelerator Mass Spectrometry Capabilities for Anthropogenic Radionuclide Analysis to Extend the Set of Oceanographic Tracers

Hain, Karin ; Martschini, Martin; Gülce, Fadime; Honda, Maki; Lachner, Johannes; Kern, Michael; Pitters, Johanna; Quinto, Francesca ORCID iD icon 1; Sakaguchi, Aya; Steier, Peter; Wiederin, Andreas; Wieser, Alexander; Yokoyama, Akihiko; Golser, Robin
1 Institut für Nukleare Entsorgung (INE), Karlsruher Institut für Technologie (KIT)

Abstract:

Recent major advances in Accelerator Mass Spectrometry (AMS) at the Vienna Environmental Research Accelerator (VERA) regarding detection efficiency and isobar suppression have opened possibilities for the analysis of additional long-lived radionuclides at ultra-low environmental concentrations. These radionuclides, including $^{233}$U, $^{135}$Cs, $^{99}$Tc, and $^{90}$Sr, will become important for oceanographic tracer application due to their generally conservative behavior in ocean water. In particular, the isotope ratios $^{233}$U/$^{236}$U and $^{137}$Cs/$^{135}$Cs have proven to be powerful fingerprints for emission source identification as they are not affected by elemental fractionation. Improved detection efficiencies allowed us to analyze all major long-lived actinides, i.e., $^{236}$U, $^{237}$Np, $^{239,240}$Pu, $^{241}$Am as well as the very rare $^{233}$U, in the same 10 L water samples of a depth profile from the northwest Pacific Ocean. For this purpose, a simplified and very flexible chemical purification procedure based on extraction chromatography (a single UTEVA® column) was implemented which can be extended by a DGA® column for Am purification. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000146299
Veröffentlicht am 13.05.2022
Originalveröffentlichung
DOI: 10.3389/fmars.2022.837515
Scopus
Zitationen: 12
Web of Science
Zitationen: 12
Dimensions
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 2296-7745
KITopen-ID: 1000146299
HGF-Programm 32.11.03 (POF IV, LK 01) Fundamental Scientific Aspects
Erschienen in Frontiers in Marine Science
Verlag Frontiers Media SA
Band 9
Seiten Art.-Nr.: 837515
Vorab online veröffentlicht am 14.03.2022
Nachgewiesen in Web of Science
Scopus
Dimensions
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