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Rainbow scattering in quasi-elastic nuclear reactions

The rainbow scattering effect in differential elastic and inelastic cross sections of 3He and 4He scattering by atomic nuclei at energies E>or approximately=100 MeV has been studied by making use of a model-free determination of the real part of the nuclear scattering phase. The experimentally observed diffraction oscillation damping in differential elastic and inelastic cross sections is reproduced quite well. A similar effect in the (3He,3H) quasi-elastic charge-exchange reaction cross section is predicted.