Relation of E1 pygmy and toroidal resonances
1 Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia
2 Institute of Particle and Nuclear Physics, Charles University, CZ-18000, Praha 8, Czech Republic
3 Institut für Theoretische Physik II, Universität Erlangen, D-91058, Erlangen, Germany
a e-mail: firstname.lastname@example.org
Published online: 28 May 2015
A possible relation of low-lying E1 strength ("pygmy resonance") and toroidal strength is analyzed by using Skyrme random-phase-approximation (RPA) results for the strength functions, transition densities and current fields in 208Pb. It is shown that the irrotational pygmy motion can appear as a local manifestation of the collective vortical toroidal dipole resonance (TDR) at the nuclear surface. The RPA results are compared to unperturbed (1ph) ones.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.