SAMOP 2023 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 7: Poster

MS 7.5: Poster

Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof

Fe-55 ion implantation by resonance ionization mass spectrometry for the PrimA-LTD project — •Thorben Niemeyer¹, Sebastian Berndt¹, Holger Dorrer¹, Nina Kneip², Dennis Renisch^1,3, Dominik Studer^1,3,4, Christoph E. Düllmann^1,3,4, and Klaus Wendt¹ — ¹Johannes Gutenberg Universität Mainz, 55099 Mainz — ²Leibniz Universität Hannover, 30060 Hannover — ³Helmholtz-Institut Mainz, 55090 Mainz — ⁴GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt

New activity standardisation techniques for radionuclide metrology are developed within the scope of the the PrimA-LTD project. Low temperature micro calorimeters will be implanted with 100 Bq Fe-55 to measure its fractional electron-capture probabilities in the K-, L- and M-shell with high precision. This will allow experimental assessment of high-precision theoretical calculations.

The implantation of Fe-55 into the absorbers of the microcalorimeters is underway at the RISIKO mass separator at Mainz University. The resonance ionisation mass spectrometry method will be used due to its outstanding element selectivity and efficiency. Fully-automated pulsed Ti:Sa lasers are used to probe the atomic spectrum below and above the ionization potential. Measurements of Rydberg series allow the verification of the known ionization potential while strong auto-ionizing states will be used for the identification of a new element-selective two-step ionization scheme later to be used for the implantation. Laser spectroscopy and efficiency measurements of RISIKO are performed with stable Fe-56.