An analysis of low-lying collective states in ${}_{}{}^{110,112,114}{}_{}{}^{}\mathrm{Cd}$ has been performed within the framework of the interacting proton-neutron boson model. The influence of model parameters on level schemes and electromagnetic properties has been investigated, in particular, as far as the breaking of F-spin symmetry is concerned. The $2_3^{+}$ state is suggested as a relatively pure F=${\mathit{F}}_{\max }$-1 (‘‘mixed-symmetry’’) state in the three isotopes.

• Received 20 May 1991

DOI:https://doi.org/10.1103/PhysRevC.44.1508