ACTA PHYSICA POLONICA B, cilt.39, sa.6, ss.1413-1427, 2008 (SCI-Expanded)
The dipole response function of nuclear matter at zero and finite temperatures is investigated in an extended RPA approach by including collisional damping mechanism and coherent damping due to particle-phonon coupling. Calculations are carried out for nuclear dipole vibrations by employing the Steinwedel-Jensen model and compared with experimental results for Sn-120 and Pb-208.