Erlangen 2026 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 13: Structure and Dynamics of Nuclei III
HK 13.8: Talk
Tuesday, March 17, 2026, 18:30–18:45, AM 00.011
Results and recent updates for electron-gamma coincidence experiments at the S-DALINAC — •Bastian Hesbacher1, J. Birkhan1, J. Isaak1, D. H. Jakubassa-Amundsen2, O. Möller1, N. Pietralla1, T. Ramaker1, D. Richter1, X. Roca-Maza3, D. Schneider1, and G. Steinhilber1 — 1Institut für Kernphysik, TU Darmstadt, Germany — 2Mathematisches Institut, LMU München, Germany — 3INFN, Sezione di Milano, Italy
The all-electromagnetic (e,e′γ) reaction had first been used for nuclear structure measurements in the 1980s [1]. Since then very few experiments were based on this reaction. In 2021 first successful (e,e′γ) measurements were performed at the S-DALINAC with improved resolution of electron energy, gamma energy and coincidence time by two orders of magnitude [2]. The scattered electrons were registered with the QCLAM spectrometer. The γ-radiation was detected by LaBr3:Ce detectors. Measurements on 12C and 96Ru targets were performed and demonstrated the superior performance of the new facility over previous attempts to study (e,e′γ) reactions. Results on the γ-decay behaviour and angular distributions of 96Ru will be presented. In addition, recent updates for the experimental setup will be presented which enhance the performance for upcoming experimental campaigns.
This work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 279384907 - SFB 1245
[1] C. N. Papanicolas et al., Phys. Rev. Lett. 54, 26 (1985).
[2] B. Hesbacher et al., Nucl. Instrum. Methods Phys. Res. A 1078, 170574 (2025).
Keywords: Electron scattering; Coincidence; Ruthenium; Bremsstrahlung; S-DALINAC