Mainz 2026 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 1: Resonance Ionization Spectroscopy / Mass Spectrometry
MS 1.3: Vortrag
Montag, 2. März 2026, 12:15–12:30, N 6
High-resolution resonance ionisation spectroscopy on a sequence of americium isotopes 241-243Am — •Pia Breinbauer1, Sebastian Berndt1, Christoph E. Düllmann1,2,3, Raphael Hasse1, Ulli Köster4, Andrea T. Loria Basto1,2, Christoph Mokry1,2, Sebastian Raeder3, Jörg Runke1,3, Matou Stemmler1, and Klaus Wendt1 — 1JGU Mainz — 2HIM Mainz — 3GSI Darmstadt — 4ILL Grenoble
High-resolution laser spectroscopy measurements were performed on the americium isotopes 241Am and 243Am, as well as the long-lived isomer 242mAm, at the RISIKO mass separator of Johannes Gutenberg University Mainz. 242mAm had been produced by a high fluence neutron irradiation of a 241Am target at the ILL high flux reactor. The measurements were performed using two-step resonance ionisation spectroscopy (RIS) in two well established excitation schemes. Previous 241Am and 243Am data serve as a reference for the analysis of 242mAm.
The spectra were analysed using the SATLAS package to yield hyperfine parameters A and B, as well as centers of gravity for both transitions. These results provide quantitative estimates of the magnetic dipole and electric quadrupole moments of the isomer 242mAm, complementing the parameters of the isotopes 241Am and 243Am.