Freiburg 2024 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 4: Poster

MS 4.7: Poster

Dienstag, 12. März 2024, 17:00–19:00, Aula Foyer

Preparing the implantation of ⁵⁵Fe for radioactive activity standardisation at RISIKO using RIMS — •Daniel Mowitz¹, Sebastian Berndt¹, Holger Dorrer¹, Christoph E. Düllmann^1,2,3, Raphael Hasse¹, Sebastian Kempf⁵, Tom Kieck^2,3, Nina Kneip⁴, Michael Müller⁵, Ole J. Nähle⁶, Thorben Niemeyer¹, Dennis Renisch^1,3, and Klaus Wendt¹ — ¹Johannes Gutenberg-Universität, Mainz — ²GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — ³Helmholtz-Institut, Mainz — ⁴Leibniz Universität, Hannover — ⁵Institut für Mikro- und Nanoelektronische Systeme, Karlsruhe — ⁶Physikalisch-Technische Bundesanstalt, Braunschweig

In the frame of the EU PrimA-LTD project, injection of 5 Bq of the radioisotope ⁵⁵Fe into gold absorbers of metallic magnetic calorimeter (MMC) detectors with a size of 0.14 x 0.14 mm² is in progress at the RISIKO mass separator at JGU Mainz. Within PrimA-LTD, new activity standardisation techniques for radionuclide metrology are developed to increase the resolution of energy measurements on electron-capture decay considerably. Resonance ionisation mass spectrometry with a recently developed two-step ionisation scheme for iron is employed using the JGU Ti:Sa laser systems, to ensure outstanding element selectivity and efficiency. In order to attain maximum ion beam quality, i.e. yield and purity in respect to the ubiquitous stable iron isotopes ^54,56,57,58Fe, several components of the laser ion source unit were optimized. Mass spectra and further implantation tests show the feasibility of our approach and will be discussed at the conference.

Keywords: RIMS; isotope selection; radioisotope investigation