Köln 2025 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 1: Heavy and Superheavy Elements
MS 1.3: Vortrag
Montag, 10. März 2025, 15:45–16:00, HS 2 Chemie
Analysis and quantification of a transcurium breeding solution after intense neutron irradiation at ORNL via RIMS — •Sebastian Berndt1, Christoph E. Düllmann1,2,3, Raphael Hasse1, Andrea T. Loria Basto1,2, Christoph Mokry1,2, Thorben Niemeyer1, Sebastian Raeder2,3, Dennis Renisch1,2, Jörg Runke1,3, Samantha K. Schrell4, Matou Stemmler1, and Klaus Wendt1 — 1Johannes Gutenberg University Mainz, Mainz, Germany — 2Helmholtz-Institut Mainz, Mainz, Germany — 3GSI, Darmstadt, Germany — 4Oak Ridge National Laboratory, Oak Ridge, TN, USA
The High Flux Isotope Reactor at Oak Ridge National Laboratory produces trans-Cm samples through intense neutron irradiation. The expected isotope yields are modeled, but these models require experimental benchmark data. In this context, a trans-Cm sample was characterized using α- and γ-spectrometry as well as Resonance Ionization Mass Spectrometry (RIMS) for an isotopically resolved determination of the Np, Pu, Am, Cm and Cf content. Such a characterization of the isotopic composition of a mixed actinide solution by α- and γ-spectrometry can be difficult due to large differences in the half-lives of the individual nuclides ranging from a few up to 107 years. In addition, the individual α- or γ-lines of several nuclides overlap. In contrast, RIMS is an efficient and, due to the ionization process, element-selective technique with the capability of resolving the elemental and isotopic composition avoiding such disadvantages. The results of the combined approach of classical radioanalytics and RIMS will be presented.
Keywords: actinides; resonance ionization mass spectrometry; alpha spectrometry