Erlangen 2026 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 31: Structure and Dynamics of Nuclei VII
HK 31.1: Gruppenbericht
Donnerstag, 19. März 2026, 13:45–14:15, AM 00.011
Studying Exotic Nuclei with the FRS Ion Catcher: Recent Results and Developments — •Meetika Narang for the Super-FRS Experiment Collaboration collaboration — GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.
At the Fragment Separator (FRS) of GSI/FAIR, exotic nuclei are produced at relativistic energies via projectile fragmentation or fission and are separated in-flight. The fragments are subsequently thermalized in the Cryogenic Stopping Cell (CSC) and delivered to the multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS), which features a high resolving power of up to one million and mass accuracies down to 10−8 in short cycle times of a few tens of milliseconds.
A wide range of nuclides has been studied at the FRS Ion Catcher. Direct mass measurements of neutron-deficient isotopes near the N = Z line below 100Sn and neutron-rich nuclei close to the N = 126 shell closure below 208Pb have been performed, providing new insights into the evolution of nuclear structure in these key regions. Mass measurements of fission products from a 252Cf spontaneous fission source have shown evidence for shape phase transitions around N ≈ 90 (Z = 56–63) and enabled the direct determination of independent isotopic fission yields (IIFYs). Recent proof-of-principle experiments were performed focusing on multi-nucleon transfer reactions and the study of fundamental laws of nature by employing radioactive molecules.
This contribution presents an overview of the experimental setup, technical developments, recent experimental highlights, and prospects for upcoming experiments.
Keywords: Exotic nuclei; Mass measurements; MR-TOF-MS; Cryogenic Stopping Cell (CSC); FRS Ion Catcher