“…But the available models such as quasiparticle-phonon nuclear model (QPNM) [1][2][3], multiphonon model (MPM) [8], self-consistent collective coordinate method (SCCM) [9] and some others are rather cumbersome and difficult to comprehend. Moreover, these models sometimes give contradictory predictions (see, for example, the discussion on the two-phonon states in [8]). In this connection a model might be useful which on the one hand would include the main points of the available microscopical approaches and on the other hand would be simplified, as far as possible, so as to provide a simple and clear picture on the qualitative level of general features of the interaction between multiphonon configurations.…”