Köln 2025 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 33: Structure and Dynamics of Nuclei IX

HK 33.4: Talk

Wednesday, March 12, 2025, 18:30–18:45, HS 2 Physik

Precision Fragmentation Studies at the GSI FRS — •Justus Eder for the Super-FRS Experiment collaboration — GSI Helmholtzzentrum für Schwerionenforschung — Justus-Liebig Universität Giessen

The study of nuclear properties and the development of nuclear models require detailed investigations of exotic nuclei at the limits of stability. Moreover, testing fragmentation models demands thorough investigations involving the production, separation and identification of these nuclei. In-flight separators are key instruments for achieving these objectives, enabling the spatial separation and precise identification of reaction products in terms of mass, charge, and momentum. These capabilities provide access to broad regions of the nuclear landscape, facilitating advancements in our understanding of nuclear phenomena. In this presentation, the preliminary analysis of ¹⁷⁰Er fragmentation products will be discussed, focusing on yield and cross-section estimates to enable accurate statistical predictions for future experiments. The results originate from measurements conducted at the GSI Fragment Separator (FRS), using a newly developed ¹⁷⁰Er beam with 1080 MeV/nucleon impinging on a beryllium target. The study provides insights into the exotic nuclear landscape near the atomic number Z=68, providing valuable data for exploring highly deformed regions of the nuclear chart.

Keywords: Fragment Seperator (FRS); Exotic Nuclei; Production Cross-Sections; 170Er