SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 31: Structure and Dynamics of Nuclei V
HK 31.3: Vortrag
Mittwoch, 22. März 2023, 15:00–15:15, SCH/A118
Investigation of low-lying dipole excitations in 144Nd via real photon-scattering experiments — •Florian Kluwig1, Miriam Müscher1, Ronald Schwengner2, Tanja Schüttler1, and Andreas Zilges1 — 1University of Cologne, Institute for Nuclear Physics — 2Helmholtz-Zentrum Dresden-Rossendorf
Since photons only transfer small angular momenta, they are a well-suited probe to investigate dipole excitations in atomic nuclei [1]. Therefore, the (γ,γ’) or also called Nuclear Resonance Fluorescence (NRF) technique is an established method to study among others the so-called Pygmy Dipole Resonance (PDR). The PDR occurs as a concentration of electric dipole strength around and below the neutron separation energy. For the last decades, this excitation mode has been a research topic of great interest [2,3] and further systematic studies are crucial.
Due to its wide range of stable, even-even isotopes, the Nd isotopic chain is well suited for this purpose. Thus, two complementary (γ,γ’) experiments on the rare-earth nucleus 144Nd have been performed using a continuous bremsstrahlung beam at the γELBE facility [4] and utilizing quasi-monoenergetic γ rays at HIγS [5]. First results of these experiments will be presented in this contribution.
This work is partly supported by the BMBF (05P21PKEN9).
[1] A. Zilges et al., Prog. Part. Nucl. Phys. 122 (2022) 103903
[2] D. Savran et al., Prog. Part. Nucl. Phys. 70 (2013) 210
[3] A. Bracco et al., Prog. Part. Nucl. Phys. 106 (2019) 360
[4] R. Schwengner et al., Nucl. Instr. and Meth. A 555 (2005) 211
[5] H.R. Weller et al., Prog. Part. Nucl. Phys. 62 (2009) 257