Quasiparticle-phonon model and quadrupole mixed-symmetry states of 96Ru
1 Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
2 Institut für Kernphysik, Technische Universität, Darmstadt
3 GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
Published online: 19 January 2016
The structure of low-lying quadrupole states of 96Ru was calculated within the Quasiparticle-Phonon Model. It is shown that symmetric and mixed-symmetry properties manifest themselves via the structure of the excited states. The first 2+ state is collective and neutron and proton transition matrix elements Mn and Mp are in-phase, while the neutron and proton transition matrix elements Mn and Mp have opposite signs for the third 2+ state. This property of the third 2+ state leads to a large M1 transition between the first and third 2+ states. It is an unambigous demonstration of the mixed-symmetry nature of the third 2+ state. The structure of the first 1+ state is calculated. The state is a member of the two-phonon multiplet generated by the coupling of the [21+]QRPA and the [22+]QRPA states.
© Owned by the authors, published by EDP Sciences, 2016
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