Erlangen 2026 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 39: Structure and Dynamics of Nuclei VIII

HK 39.1: Vortrag

Donnerstag, 19. März 2026, 16:15–16:30, AM 00.011

Electron-Induced Fission at the S-DALINAC - Status and Objectives — •Diandra Richter, G. Steinhilber, N. Pietralla, J. Birkhan, B. Hesbacher, T. Ramaker, O. Möller, M. Arnold, and J. Isaak — IKP, Darmstadt, Germany

The origin of heavy chemical elements in the Universe remains a major open question. One of the main production mechanisms is the rapid neutron capture process. It takes place in neutron star mergers and terminates in the r-process fission cycle along very neutron-rich nuclei [1]. In the actinide region, neutron captures compete with nuclear fission, producing fragments that serve as neutron-rich r-process seeds. Accurate r-process models therefore require detailed fission data, but experimental information on fission from different excitation energies of transuranium actinides is scarce. At TU Darmstadt, a new setup for electron-induced fission is currently being developed, using electron beams from the superconducting linear accelerator S-DALINAC [2]. Silicon strip detectors will measure energies and timing of both fission fragments, while scattered electrons will be detected in coincidence using the QCLAM spectrometer. This arrangement will allow measurements of fission fragment masses as a function of excitation energy and momentum transfer. An overview of the current status will be presented in this contribution. This work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under project-ID Nos. INST 163/754-1 FUGG and 499256822 GRK 2891 "Nuclear Photonics". [1] J. J. Cowan et al., Rev. Mod. Phys. 93, 015002 (2021); [2] N. Pietralla, Nucl. Phys. News 28, 4 (2018)

Keywords: Electron-induced fission; r-process; Double sided silicon strip detectors; Electron scattering; Coincidence measurements