The study of the refractive scattering of Li-6 and He-6 on carbon target with the S-matrix approach

In this paper, the S-matrix parametrization is adopted to analyze the refractive scattering of Li-6 + C-12 at intermediate energies systematically and that of He-6 + C-12 at 230 MeV. For Li-6 + C-12, the experimental data containing the Fraunhofer oscillations and the rainbow falloff are reproduced very well by adjusting parameters. The S-matrix parameters and the rainbow angles show evident tendencies as the bombarding energy increases, which are comparable with those of He-4 elastic scattering on carbon target. For He-6 + C-12, the experimental data in the forward direction are reproduced successfully by slightly adjusting the parameters used in the calculation of Li-6 + C-12 at 210 MeV. The calculated results show that the He-6 scattering exhibits a comparable transparency with that of Li-6 at intermediate energies.