Gießen 2024 – scientific programme

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PV: Plenarvorträge

PV III

PV III: Plenary Talk

Tuesday, March 12, 2024, 09:55–10:40, HBR 14: HS 1

Photonuclear Reactions: Status and Perspectives — •Norbert Pietralla — Inst. f. Kernphysik, TU Darmstadt

Atomic nuclei react with incident photons entirely by the electromagnetic interaction. The latter is understood to any desired precision and allows to separate the reaction mechanism from the nuclear properties under study. Hence, photonuclear reactions [1] can provide precision data on precious nuclear properties. We will discuss examples for recent progress in nuclear structure physics obtained from photonuclear reactions, such as evidence for the necessity of two-body currents in the formulation of magnetic dipole transitions in nuclei [2] or for Raman scattering off the Giant Dipole Resonance of heavy nuclei. The field had been boosted by the advent of intense, fully polarized, quasi-monochromatic, energy-tunable photon beams from laser-Compton backscattering (LCB) processes. Energy-recovery linacs (ERLs) would be the ideal laser-electron colliders. The first demonstration [3] of energy recycling in a multi-turn ERL has now paved the way towards a future ERL-based LCB source. Corresponding R&D in accelerator physics will be presented. The International Research Training Group 'Nuclear Photonics' aims at supporting more than 100 Early-Career Researchers in their doctoral studies in the field. Supported by the DFG and the Hessian Ministry HMWK.

[1] A. Zilges, D. Balabanski, J.Isaak, and N. Pietralla, Prog. Part. Nucl. Phys. 122, 103903 (2022). [2] U. Friman-Gayer et al., Phys. Rev. Lett. 126, 102501 (2021). [3] F. Schließmann et al., Nat. Phys. 19, 597 (2023).

Keywords: nuclear structure physics; photonuclear reactions; accelerator physics