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Implementation of cryogenic tender X-ray HR-XANES spectroscopy at the ACT station of the CAT-ACT beamline at the KIT Light Source

Schacherl, Bianca ORCID iD icon; Prüssmann, Tim ORCID iD icon; Dardenne, Kathy ORCID iD icon; Hardock, Kirsten; Krepper, Volker; Rothe, Jörg ORCID iD icon; Vitova, Tonya ORCID iD icon; Geckeis, Horst

Abstract:

The ACT experimental station of the CAT-ACT wiggler beamline at the Karlsruhe Institute of Technology (KIT) Light Source is dedicated to the investigation of radionuclide materials with radioactivities up to 1000000 times the exemption limit by various speciation techniques applying monochromatic X-rays. In this article, the latest technological developments at the ACT station that enable high-resolution X-ray absorption near-edge structure (HR-XANES) spectroscopy for low radionuclide loading samples are highlighted – encompassing the investigation of actinide elements down to 1 p.p.m. concentration – combined with a cryogenic sample environment reducing beam-induced sample alterations. One important part of this development is a versatile gas tight plexiglass encasement ensuring that all beam paths in the five-analyzer-crystal Johann-type X-ray emission spectrometer run within He atmosphere. The setup enables the easy exchange between different experiments (conventional X-ray absorption fine structure, HR-XANES, high-energy or wide-angle X-ray scattering, tender to hard X-ray spectroscopy) and opens up the possibility for the investigation of environmental samples, such as specimens containing transuranium elements from contaminated land sites or samples from sorption and diffusion experiments to mimic the far field of a breached nuclear waste repository.


Verlagsausgabe §
DOI: 10.5445/IR/1000141664
Veröffentlicht am 30.01.2022
Originalveröffentlichung
DOI: 10.1107/S1600577521012650
Scopus
Zitationen: 5
Web of Science
Zitationen: 5
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2022
Sprache Englisch
Identifikator ISSN: 1600-5775
KITopen-ID: 1000141664
HGF-Programm 32.11.01 (POF IV, LK 01) Nuclear Waste Disposal
Erschienen in Journal of synchrotron radiation
Verlag International Union of Crystallography
Band 29
Heft 1
Seiten 80–88
Projektinformation THE ACTINIDE BOND (EU, H2020, 101003292)
Vorab online veröffentlicht am 01.01.2022
Externe Relationen Abstract/Volltext
Schlagwörter KIT light source; CAT-ACT beamline; ACT station for radionuclide research; high-resolution X-ray emission; actinide M-edge HR-XANES; cryogenic measurements.
Nachgewiesen in Dimensions
Web of Science
Scopus
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