Structure of87Y
The structure of87Y nucleus is described within the framework of the extended clusterphonon model taking into account the coupling of single-proton and two-proton-oneproton-hole configurations with quadrupole and octupole vibrations of the underlying86Sr core. The energy levels and electromagnetic transitions are calculated and compared with available experimental information. Attempts to consider the86Sr as the vibrating core were also made. In this case the cluster was extended to include two-neutron-hole states too. No results are shown since the calculations failed to explain the experimental data.