Skyrme RPA description of γ-vibrational states in rare-earth nuclei
1 Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, 141980, Russia
2 Technische Universität Dresden, Institut für Analysis, D-01062, Dresden, Germany
3 Institute of Particle and Nuclear Physics, Charles University, CZ-18000, Praha 8, Czech Republic
4 Institut für Theoretische Physik II, Universität Erlangen, D-91058, Erlangen, Germany
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Published online: 19 January 2016
The lowest γ-vibrational states with Kπ = 2+γ in well-deformed Dy, Er and Yb isotopes are investigated within the self-consistent separable quasiparticle random-phase-approximation (QRPA) approach based on the Skyrme functional. The energies Eγ and reduced transition probabilities B(E2)γ of the states are calculated with the Skyrme force SV-mas10. We demonstrate the strong effect of the pairing blocking on the energies of γ-vibrational states. It is also shown that collectivity of γ-vibrational states is strictly determined by keeping the Nilsson selection rules in the corresponding lowest 2qp configurations.
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