Multiphonon vibrational states in deformed nuclei

Abstract

The $^{154}\mathrm{Gd}$ nucleus was studied by \ensuremath{\gamma}-ray spectroscopy following the (\ensuremath{\alpha},2n) reaction at an energy of 26 MeV. We identified the double-phonon K=${4}^{+}$ \ensuremath{\gamma}\ensuremath{\gamma} 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.