Progress on the study of nuclear states with mixed proton-neutron symmetry
1 Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
2 GSI Helmholtzzentrum für Schwerionenforschung mbH, 64291 Darmstadt, Germany
3 Wright Nuclear Structure Laboratory, Yale University, New Haven, CT, U.S.A.
4 National Superconducting Cyclotron Lab, Michigan State University, East Lansing, MI 48824, USA
5 Faculty of Physics, St. Kliment Ohridski University of Sofia, BG-1164 Sofia, Bulgaria
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The one-quadrupole phonon excitation of mixed symmetry, the 2+1,ms state, is a fundamental building block of nuclear structure. This article gives a summary of our recent experimental research on this excitation mode in the A =90 and A =130 mass regions.
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