For the elastic scattering of ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ + ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, excitation functions at c.m. angles of 60, 70, 80, and 90° have been studied in the c.m. energy range 5-17 MeV, and angular distributions have been measured at c.m. energies of 6, 10, and 14 MeV. The excitation functions are relatively featureless, with a broad gross-structure peak at 90° centered around 13 MeV. Good fits to individual angular distributions are obtained with the optical model and, except for the highest energies studied, parametrized phase-shift calculations. These calculations, however, do not correctly reproduce the energy dependence of the data. The single most outstanding conclusion from the present analysis is that ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ + ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ is dominated by absorption, and this dominance leads to scattering behavior very different from that found for other heavy ions.

• Received 21 December 1970

DOI:https://doi.org/10.1103/PhysRevC.3.2133