On the information value of angular of heavy distributions in elastic scattering ions

A method is developed for computing the total cross section sigma(F) of complete and incomplete fusion, quasifission, and deep-inelastic collisions, as well as the total cross section sigma(D) of peripheral reactions, on the basis of analysis of angular distributions for elastic scattering of heavy ions. The method makes it possible, on a unified basis, to explain the mechanism of formation of sigma(F) and sigma(D) both for strongly and for weakly bound ions. The method permits the calculation of quantitative characteristics of fusion enhancement (and, accordingly, suppression of peripheral reactions) for strongly bound ions and, conversely, the suppression of fusion (and, accordingly, enhancement of peripheral reactions) for weakly bound ions. The potential of the method is demonstrated for two systems, O-16 + Pb-208 and Be-9 + Si-28, the projectile ion being strongly bound in the former system and weakly bound in the latter one. (C) 2002 MAIK"Nauka/lnterperiodica".