Correlations of quasi particles in the deformed nuclei ground states

The effect of ground state correlation on the properties of the one-phonon states in deformed nuclei is considered. The isoscalar and isovector multipole forces are taken into account. The calculations with fixed energies of first one-phonon states are shown that the ground state correlation leads to small increase of collectivity of these states. The isovector force inclusion decreases the role of correlations. On the whole, the effect of ground state correlations is small even for strongly collective states