Multiphonon vibrational states in deformed nuclei

Abstract
The Gd154 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.