Mainz 2022 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
HK: Fachverband Physik der Hadronen und Kerne
HK 50: Structure and Dynamics of Nuclei VIII
HK 50.1: Group Report
Wednesday, March 30, 2022, 16:00–16:30, HK-H6
Investigation of the low-lying dipole response in real photon-scattering experiments — •Miriam Müscher1, Johann Isaak2, Florian Kluwig1, Deniz Savran3, Ronald Schwengner4, Werner Tornow5, and Andreas Zilges1 — 1University of Cologne, Institute for Nuclear Physics — 2Institute for Nuclear Physics, TU Darmstadt — 3GSI, Darmstadt — 4Helmholtz-Zentrum Dresden-Rossendorf — 5Duke University and TUNL
The photoabsorption cross section of atomic nuclei has great impact on reaction rates in nucleosynthesis processes. For instance, the occurrence of additional dipole strength below and around the particle separation threshold, often denoted by Pygmy Dipole Resonance [1], can enhance reaction rates in the rapid neutron-capture process [2].
Real photon-scattering experiments are well suited to selectively study dipole excited states [3]. In these experiments, photoabsorption cross sections as well as spin and parity quantum numbers can be extracted in a model-independent way. Recent results of complementary (γ,γ′) experiments with bremsstrahlung (at DHIPS [4] and γELBE [5]) and with quasi-monoenergetic photons (at HIγS [6]) will be presented.
This work is supported by the BMBF (05P21PKEN9).
[1] D. Savran et al., Prog. Part. Nucl. Phys. 70 (2013) 210
[2] S. Goriely, Phys. Lett. B 436 (1998) 10
[3] U. Kneissl et al., Prog. Part. Nucl. Phys. 37 (1996) 349
[4] K. Sonnabend et al., Nucl. Instr. and Meth. A 640 (2011) 6
[5] R. Schwengner et al., Nucl. Instr. and Meth. A 555 (2005) 211
[6] H.R. Weller et al., Prog. Part. Nucl. Phys. 62 (2009) 257