  The pygmy dipole resonance and photon strength functions (PSF) in stable and
unstable Ni and Sn isotopes are calculated within the microscopic
self-consistent version of the extended theory of finite fermi systems in the
quasiparticle time blocking approximation. The approach includes phonon
coupling (PC) effects in addition to the standard QRPA approach. The Skyrme
force SLy4 is used. A pygmy dipole resonance in 72Ni is predicted at the mean
energy of 12.4 MeV exhausting 25.7% of the total energy-weighted sum rule. With
our microscopic E1 PSFs in the EMPIRE 3.1 code, the following radiative nuclear
reaction characteristics have been calculated for several stable and unstable
even-even Sn and Ni isotopes: 1) neutron capture cross sections, 2)
corresponding neutron capture gamma-spectra, 3) average radiative widths of
neutron resonances. Here, three variants of the microscopic nuclear level
density models have been used and a comparison with the phenomenological
generalized superfluid model (GSM) has been performed. In all the considered
properties, including the recent experimental data for PSF in Sn isotopes, the
PC contributions turned out to be significant, as compared with the QRPA one,
and necessary to explain the available experimental data. The phenomenological
GSM NLD model used in EMPIRE3.1 gives, on the whole, the worse results than the
microscopic HFB plus combinatorial NLD model.
