부산대학교 도서관

The low-energy 1 states in deformed Dy and spherical Ni are explored in the framework of fully self-consistent Quasiparticle Random-Phase Approximation (QRPA) with various Skyrme forces. The main attention is paid to orbital and spin 1 excitations. The obtained results are compared with the prediction of the low-energy spin-scissors 1 resonance suggested within Wigner Function Moments (WFM) approach. A possible relation of this resonance to low-energy spin-flip excitations is analyzed. In connection with recent WFM studies, we consider evolution of the low-energy spin-flip states in Dy with deformation (from the equilibrium value to the spherical limit). The effect of tensor forces is briefly discussed. It is shown that two groups of states observed at 2.4–4 MeV in Dy are rather explained by fragmentation of the orbital 1 strength than by the occurrence of the collective spin-scissors resonance. In general, our calculations do not confirm the existence of this resonance. [ABSTRACT FROM AUTHOR]