The ${}_{}{}^{154}{}_{}{}^{}\mathrm{Gd}$ nucleus was studied by γ-ray spectroscopy following the (α,2n) reaction at an energy of 26 MeV. We identified the double-phonon K=$4^{+}$ γγ vibrational band in this nucleus at 1645.8 keV. Also, we present the systematics of possible K=$4^{+}$ double phonon vibrational bands in the deformed rare-earth region of nuclei.

• Received 6 July 1993

DOI:https://doi.org/10.1103/PhysRevC.49.1837