Role of Channel Coupling and Deuteron-Exchange Mechanismsin Anomalous Alpha-Particle Scattering on 6Li

摘要

A unified description of existing experimental data on alpha-particle scattering by 6Li over thebroad energy range from 18 to 166 MeV was obtained with allowance for channel-coupling effects andmechanisms involving the exchange of a deuteron cluster. Angular distributions were analyzed on the basisof the optical model and the coupled reaction channels method. It was shown that the inclusion of channelcoupling and the contributions from one- and two-step exchange mechanisms makes it possible to describespecial features of the behavior of differential cross sections for both elastic and inelastic scattering in a fullenergy range. Optimum values found for the parameters of optical potentials agree with the parameters ofthe global potential proposed previously for nuclei in the mass region A > 12.