München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 36: Structure and Dynamics of Nuclei VI

HK 36.5: Vortrag

Mittwoch, 20. März 2019, 15:15–15:30, HS 14

Multi-messenger investigation of the Pygmy Dipole Resonance in ¹⁴⁰Ce — •D. Savran¹, V. Derya², S. Bagchi^1,3, J. Endres², M.N. Harakeh³, J. Isaak⁴, N. Kalantar-Nayestanaki³, E.G. Lanza⁵, B. Löher⁴, A. Najafi³, S. Pascu^2,6, S.G. Pickstone², N. Pietralla⁴, V.Yu. Ponomarec⁴, C. Rigollet³, C. Romig⁴, M. Spieker², A. Vitturi^7,8, 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