Skyrme RPA description of γ -vibrational states in rare-earth nuclei

• Published in: EPJ Web of Conferences Vol. 107; p. 3003
• Main Authors: Nesterenko, V.O., Kartavenko, V.G., Kleinig, W., Kvasil, J., Repko, A., Jolos, R.V., Reinhard, P.-G.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Les Ulis EDP Sciences 01-01-2016
• Subjects: Deformation; Dysprosium isotopes; Erbium; Rare earth elements; Transition probabilities; Vibrational states; Ytterbium
• ISSN: 2100-014X; 2101-6275; 2100-014X
• DOI: 10.1051/epjconf/201610703003

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.