Interaction of two-quasiparticle and phonon excitations in even-even atomic nuclei

A study is made of the possibility of describing the interaction of two-quasiparticle and phonon excitations in even–even atomic nuclei in a semimtcroscopic approach. It is shown that this interaction has an important influence on the structure of excited states with energy 1.5-2.5 MeV in deformed nuclei and some spherical nuclei. Formulas are obtained for the energies of the states and the coefficients in their wave functions.