München 2019 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 36: Structure and Dynamics of Nuclei VI
HK 36.5: Talk
Wednesday, March 20, 2019, 15:15–15:30, HS 14
Multi-messenger investigation of the Pygmy Dipole Resonance in 140Ce — •D. Savran1, V. Derya2, S. Bagchi1,3, J. Endres2, M.N. Harakeh3, J. Isaak4, N. Kalantar-Nayestanaki3, E.G. Lanza5, B. Löher4, A. Najafi3, S. Pascu2,6, S.G. Pickstone2, N. Pietralla4, V.Yu. Ponomarec4, C. Rigollet3, C. Romig4, M. Spieker2, A. Vitturi7,8, and A. Zilges2 — 1GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt — 2Institut für Kernphysik, Universität zu Köln — 3KVI-CART, University of Groningen, the Netherlands — 4Institut für Kernphysik, TU Darmstadt — 5INFN Sezione di Catania, Italy — 6National Institute for Physics and Nuclear Engineering, Bucharest — 7Dipartimento di Fisica e Astronomia Galileo Galilei, Universita di Padova, Italy — 8INFN Sezione di Padova, Italy
Beside the Giant Dipole Resonance, many nuclei show the feature of additional low-lying electric dipole (E1) strength, which is usually denoted as Pygmy Dipole Resonance (PDR). Most of the available data has been obtained in photon induced reactions or coulomb excitation, which are, however, not sensitive to the structure of the E1 excitations. We have therefore started a campaign to provide additional experimental data using complementary probes or observables. For the semi-magic nucleus 140Ce we combine the results from different experiments using proton, α as well as photon scattering in a multi-messenger investigation [1]. The results are presented and compared to calculations within the Quasi-particle Phonon Model.
D. Savran et al., Phys. Lett. B 786 (2018) 16