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Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 29: Structure and Dynamics of Nuclei V

HK 29.1: Talk

Tuesday, March 29, 2022, 16:00–16:15, HK-H6

Total Reaction Cross-Section Measurements in the S444 Commissioning Experiment for R3B — •Lukas Ponnath1, Roman Gernhäuser1, Tobias Jenegger1, Philipp Klenze1, and Thomas Aumann2 for the R3B collaboration — 1Technische Universität München — 2Technische Universität Darmstadt

The R3B (Reactions with Relativistic Radioactive ion Beams) experiment at the research facility FAIR, currently under construction in Darmstadt, enables kinematically complete reaction studies for the most exotic nuclei.
The S444 commissioning experiment for R3B, performed in the FAIR Phase-0 campaign in 2019, was the first operation of many new R3B detectors in a common setup. With a stable 12C beam and a set of different beam energies ranging from 400AMeV to 1AGeV we challengend this large installation around the GLAD magnet using the 12C(p,2p)11B benchmark reaction.
During this successful commissioning we could measure the energy dependence of total reaction cross-sections of a 12C beam on a 12C target, which is poorly known for energies above 400AMeV. This is an important input for current calculations based on the eikonal reaction theory.
In my Talk I will present the current status and preliminary results of the analysis and discuss the technique and evaluated error budget for the different steps.
(supported by BMBF 05P21WOFN1)

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