Bonn 2020 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 17: Structure and Dynamics of Nuclei III

HK 17.1: Gruppenbericht

Dienstag, 31. März 2020, 17:00–17:30, J-HS E

Studying the nuclear electric-dipole response in multi-messenger experiments: A holistic view on 120,124Sn — •Michael Weinert1, Michelle Färber1, Miriam Müscher1, Deniz Savran2, Philipp Scholz1, Julius Wilhelmy1, and Andreas Zilges11Institute for Nuclear Physics, University of Cologne — 2GSI, Darmstadt

Over the past decade, great effort has been put into experiments studying the low-energy electric-dipole response (LEDR) of atomic nuclei. The work horse experiments with bremsstrahlung-photon beams have been complemented by measurements using hadronic probes, following a multi-messenger approach.

For the isotopes 120,124Sn, the most complete set of experiments has been performed, investigating the LEDR via real and virtual photon scattering as well as with hadronic probes, such as transfer reactions and proton and α-particle scattering at different incident energies. From earlier results, it is known that the comparison of the nuclear response to these different probes can shed vital light on the underlying nuclear structure [1-3]. This contribution will give an overview on the data sets available today. It will investigate similarities and differences between the measurements and try to anticipate systematic behavior along the tin isotopic chain.

Supported by DFG (ZI 510/7-1).

[1] J. Endres et al., Phys. Rev. Lett. 105 (2010) 212503

[2] L. Pellegri et al., Phys. Lett. B 738 (2014) 519

[3] D. Savran et al., Phys. Lett. B 786 (2018) 16

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