SMuK 2021 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 30: Structure and Dynamics of Nuclei II
HK 30.1: Gruppenbericht
Freitag, 3. September 2021, 14:00–14:30, H4
Studying the Low-Energy Electric Dipole Response of Different Nuclei with SONIC@HORUS — •Michael Weinert, Florian Kluwig, Miriam Müscher, Julius Wilhelmy, Barbara Wasilewska, and Andreas Zilges — University of Cologne, Institute for Nuclear Physics, 50937 Cologne, Germany
The specific structures that generate the low-energy electric dipole response (LEDR) in medium to heavy mass nuclei have been highly debated and investigated over the past two decades. Deeper knowledge was obtained by comparing direct measurements of the nuclear photo-response in real-photon scattering experiments with the response to other probes, such as alpha particles or high energy protons, and trying to reproduce the differing responses with theoretical models. This contribution will present the recent developments in Cologne, where specific single-particle structures in the LEDR of 120Sn could be studied in a (d,pγ) reaction at Ed=8.5 MeV using the SONIC@HORUS setup, extending the established capabilities of the transfer reaction [1]. Also, for the first time, a consistent theoretical approach was developed to predict the shape of the LEDR, and also the excitation and decay behavior in the experiment. A comparison to 120Sn(α,α′γ) under forward angles will be drawn and results from 124Sn(p,p′γ) [2] and a recent 40,44,48Ca(p,p′γ) campaign with SONIC@HORUS will be presented.
[1] M. Spieker, et al., Phys. Rev. Lett. 125, 102503 (2020)
[2] M. Färber, et al., Eur. Phys. J. A (2021) 57:191