Erlangen 2026 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 31: Structure and Dynamics of Nuclei VII

HK 31.6: Talk

Thursday, March 19, 2026, 15:30–15:45, AM 00.011

Production cross section measurements with a 170Er beam at the GSI FRS — •Justus Eder for the Super-FRS Experiment collaboration — GSI Helmholtzzentrum für Schwerionenforschung — Justus-Liebig Universität Giessen

New production cross section results are presented from the FAIR Phase-0 experiment "Structure of neutron-rich, rare-earth nuclei far from stability" (G-22-00100), performed at the GSI Fragment Separator (FRS) using the newly developed 1080 MeV/u ¹⁷⁰Er beam on a beryllium target. The measurements probe the exotic, highly deformed nuclear region near Z=68, employing both the Bρ−Δ E−Bρ separation and Bρ−Δ E^*−TOF-identification techniques. Particle identification has been significantly improved through refined delay-line corrections in the tracking detectors TPCs, which enhance position resolution, as well as position-dependent timing corrections in the scintillators, leading to more accurate time-of-flight measurements. Preliminary production cross sections obtained with these refinements are reported. Remaining corrections, systematic uncertainties, and prospects for further refinement are briefly discussed. These developments support future high-precision cross section studies, which are of relevance for reliable yield predictions for future NUSTAR experiments at FAIR.

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