Dynamical polarization potential due to the excitation of collective states

M. V. Andrés, F. Catara, E. G. Lanza
1991 Physical Review C  
Within the Feshbach formalism we calculate the nucleus-nucleus dynamical polarization potential arising from the coupling of the elastic channel to the collective vibrational states, described by the random-phase approximation. Calculations for the systems ' 0+ Ca and Ca+ Ca show the importance of the high-lying states. They give the main contribution to the real part of the polarization potential at every incident energy, while they dominate the imaginary part only at very high energy. At low
more » ... nergy the absorption is given by the low-lying states. The real and imaginary parts of the potential are shown to obey a dispersion relation. Calculations of elastic cross section give a good description of the experimental data.
doi:10.1103/physrevc.44.2709 pmid:9967706 fatcat:f4g5kksaara3hhmnjejhx322bm