[en] It is shown that the rotational invariance of an arbitrary axially-symmetric nuclear potential can be restored with the aid of effective factorized two-body forces whose form and strength parameters are associated with the nonspherical part of the potential. The Hamiltonian obtained according to this method is applied to the descripton of Ksup(π)=1sup(+) exitations in even-even deformed nuclei. In RPA those excitations are separated into rotational and vibrational branches. In odd-mass nuclei the polarization effects arising from the coupling of quasi-particle to vibrational 1⁺ states of the core are considered. In particular, this coupling leads to a renormalization of one-particle matrix elements of E2 transitions with Δ=1. The renormalization may be reduced to dynamic (configuration dependent) effective charges. The calculated charges are shown. The interband E2 transitions in ²35U have been considered within the framework of the intermediate coupling model. The B(E2,ΔK=1) values are, to the leading order, due to the Coriolis coupling of states but the contribution from singleparticle transitions reduces these values by as such as 20 to 30%