  The observed cross sections of quasi-elastic scattering of 6He, 7Be, and 8B
nuclei by 12C nuclei are described within the framework of the diffraction
nuclear model and the model of nucleus-nucleus scattering in the high-energy
approximation with a double folding potential, for intermediate energies of the
incident particles. The calculations make use of realistic distributions of
nucleon densities and take account of the Coulomb interaction and inelastic
scattering with excitation of low-lying collective states of the target.
