SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 31: Structure and Dynamics of Nuclei V
HK 31.1: Gruppenbericht
Mittwoch, 22. März 2023, 14:00–14:30, SCH/A118
Real photon-scattering experiments for the study of dipole excitations — •Miriam Müscher1, Johann Isaak2, Florian Kluwig1, Deniz Savran3, Tanja Schüttler1, Ronald Schwengner4, and Andreas Zilges1 — 1University of Cologne, Institute for Nuclear Physics — 2TU Darmstadt, Institute for Nuclear Physics — 3GSI, Darmstadt — 4Helmholtz-Zentrum Dresden-Rossendorf
Absolute photoabsorption cross sections of atomic nuclei can have great impact on reaction rates in nucleosynthesis processes. Hence, they are crucial to understand the nuclear abundances in our universe.
Real photon-scattering experiments are well suited to study the dipole response due to the small angular-momentum transfer of photons [1, 2]. Besides the determination of spin and parity quantum numbers of excited states in even-even nuclei, absolute and total photoabsorption cross sections can be extracted in a model-independent way by combining complementary (γ,γ’) experiments. The most common photon sources are, on the one hand, energetically-continuous bremsstrahlung and, on the other hand, Laser-Compton Backscattering producing a linearly-polarized, quasimonoenergetic γ-ray beam.
In this contribution, the aforementioned complementary photon sources, examples for corresponding setups, and recent results will be presented.
This work is supported by the BMBF (05P21PKEN9).
[1] U. Kneissl et al., Prog. Part. Nucl. Phys. 37 (1996) 349
[2] A. Zilges et al., Prog. Part. Nucl. Phys. 122 (2022) 103903