Splitting and structure of the giant quadrupole resonances in deformed nuclei

Abstract

We have performed microscopic calculations of the low-lying and high-lying Kπ=0+, 1+, and 2+ states in deformed rare-earth nuclei. The centroids of the isoscalar giant quadrupole resonance in 160Dy, 170Yb, and 184W are at 11.58, 11.44, and 11.22 MeV, respectively. A broadening of these resonances due to the deformation is predicted which varies appreciably in the different nuclei. About 20% of the monopole strength is found in the same energy range.