München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 42: Structure and Dynamics of Nuclei VIII

HK 42.4: Vortrag

Mittwoch, 20. März 2019, 17:30–17:45, HS 14

Electric dipole excitation of neutron-rich nuclei in a relativistic energy density functional approach — •Stefan Typel — Institut für Kernphysik, Technische Universität Darmstadt — GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt

Neutron-rich nuclei are expected to exhibit a low-lying pygmy resonance in the strength distribution of electric dipole excitations that is correlated with the neutron skin thickness and the slope of the nuclear symmetry energy. This feature can be studied theoretically with the help of relativistic energy density functionals employing a systematic variation of the isovector part in the effective interaction. In contrast to conventional RPA-type calculations, a shell-model inspired approach is explored in the present contribution with particular interest in the evolution of the dipole strength distribution across neutron shell closures.