Erlangen 2026 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 21: Structure and Dynamics of Nuclei V
HK 21.5: Vortrag
Mittwoch, 18. März 2026, 15:00–15:15, AM 00.011
Laser Spectroscopy of neutron-rich and neutron-deficient Tm isotopes with RADRIS at GSI/HIM and RISIKO at JGU Mainz — •Jana Weyrich for the RADRIS collaboration — GSI, Darmstadt, DE — Helmholtz-Institut, Mainz, DE — Johannes Gutenberg-Universität, Mainz, DE
Nuclear shell effects stabilize the nuclei of heavy and superheavy elements against spontaneous fission, counteracting the Coulomb repulsion of the protons in the nucleus. Thus, studying physical properties in that region of the nuclear chart enhances our understanding of the nuclear structure. These elements, however, are radioactive, often short-lived, and generally produced only in limited quantities. As a result, the technique of Resonance Ionization Spectroscopy (RIS) plays a crucial role in studying atomic spectra to determine atomic and nuclear properties, as it features high sensitivity, efficiency, and selectivity. As on-line studies of the rare species are time- and cost-intensive, it is advisable to investigate lighter atomic homologues in advance.
In this work, studies of 169Tm and 170Tm were performed with the RISIKO mass separator at JGU Mainz, Germany, to study the sensitivity of ionization schemes. Further on-line studies with the RAdiation Detected Resonance Ionization Spectroscopy (RADRIS) apparatus at GSI-FAIR in Darmstadt, Germany, included 152mTm, 153Tm, and 154mTm. In this contribution, the results will be discussed, which include isotope shift measurements in three optical transitions and a first determination of the magnetic moment of 152mTm.
Keywords: Resonance Ionization Laser Spectroscopy; RADRIS; Superheavy Elements; Isotope Shift; Magnetic moment