https://doi.org/10.1051/epjconf/201610703004
Search for mixed-symmetry states of nuclei in the vicinity of the double-magic nucleus 208Pb
1 Faculty of Physics, St. Kliment Ohridski University of Sofi, 1164 Sofia, Bulgaria
2 Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
3 Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
4 Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, 1784 Sofi, Bulgaria
5 Physics Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
6 Grand Accélérateur National d’Ions Lourds, CEA/DSM-CNRS/IN2P3, BP 55027, F-14076, Caen Cedex 5, France
a rig@phys.uni-sofia.bg
b Present address: University of the West of Scotland, PA1 2BE Paisley,
United Kingdom and Scottish Univ. Phys. Alliance, Glasgow G12 8QQ, Scotland
Published online: 19 January 2016
In this work we present the results from two experiments dedicated to search for quadrupolecollective isovector valence-shell excitation, the states with so-called mixed proton-neutron symmetry (MSS), in nuclei around the doubly magic nucleus 208Pb. 212Po was studied in an α-transfer reaction. 204Hg was studied in an inverse kinematics Coulomb excitation reaction on a carbon target. Both experiments provide indications for existence of one-phonon MSSs. Those are the first experimentally identified MSSs in the mass A ≈ 208 region.
© Owned by the authors, published by EDP Sciences, 2016
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.
