Abstract
A way to solve the system of equations of the traditional coupled-channel approach (CCA) by means of the Green-function method is proposed. A many-phonon CCA version is formulated within the harmonic (for the phonons) approximation. Within this version the A-dependence of the s- and p-neutron strength functions and scattering radii, the anisotropy parameters of the angular distribution and the polarization for the elastic scattering, the total inelastic-scattering cross section (to the first 2 + level) are calculated. It is shown that for many nuclei it is necessary to take into account the coupling of single-particle states to many-phonon ones and for these nuclei the mentioned characteristics are slightly dependent on the strength of the imaginary part of the optical potential.
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