EPJ Web of Conferences
Volume 38, 2012NSRT12 – International Conference on Nuclear Structure and Related Topics
|Number of page(s)||8|
|Section||Session 3 Chairperson – Shan-Gui Zhou|
|Published online||10 December 2012|
Nuclear pygmy modes and the dynamics of the nuclear skin
1 Institut für Theoretische Physik, Universität Giessen, 35390 Giessen, Germany
2 Institute for Nuclear Research and Nuclear Energy, 1784 Sofia, Bulgaria
a e-mail: firstname.lastname@example.org
The information on pygmy resonances reveals new aspects on the isospin dynamics of the nucleus with important astrophysical consequences. In this connection, the precise knowledge of nuclear response functions plays a key role in the determination of photonuclear reactions cross sections which are of importance for the synthesis of heavy neutron-rich elements. For that purpose, a theoretical method based on density functional theory and multi-phonon approach is applied for investigations of nuclear excitations with different multipolarities and energies in stable and exotic nuclei. The possible relation of low-energy modes to the properties of neutron or proton skins is systematically investigated for isotonic and isotopic chains. Our studies of dipole and quadrupole response functions and the corresponding transition densities indicate new pygmy dipole and pygmy quadrupole resonances, describing oscillations of the nuclear skin. Also, the presence of skins is found to affect the magnetic response of nuclei.
© Owned by the authors, published by EDP Sciences, 2012
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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