Speaker
Description
The Pygmy Dipole Resonance (PDR) is a low-energy excitation mode contributing to the electric dipole response in atomic nuclei. Despite significant theoretical and experimental progress over the past decades [1-3], its precise nature and origin are still under investigation. To clarify these open questions, systematic studies along isotopic and isotonic chains are essential. Such research has been performed near the $N=82$ shell closure, focusing on the $N=84$ isotones $^{144}$Nd and $^{142}$Ce. These nuclei were examined using Nuclear Resonance Fluorescence (NRF), a method based on real-photon scattering. Due to their low angular momentum transfer, photons are particularly well suited for studying the PDR [4]. This contribution presents and compares NRF data obtained for $^{144}$Nd and $^{142}$Ce. Supported by the DFG (ZI510/10-2).
References
[1] D. Savran et al., Prog. Part. Nucl. Phys. 70 (2013) 210.
[2] A. Bracco et al., Prog. Part. Nucl. Phys. 106 (2019) 360.
[3] E.G. Lanza et al., Prog. Part. Nucl. Phys. 129 (2023) 104006.
[4] A. Zilges et al., Prog. Part. Nucl. Phys. 122 (2022) 103903.
