Some Peculiarities of Interactions of Weakly Bound Lithium Nuclei at Near-Barrier Energies

This paper presents new experimental data on the total cross sections of Li-9 + Si-28 reactions at low energies as well as the analysis of previously obtained data for Li-6,Li-7. Based on a large collection of data (authors' and literature data) we carried out a comparative analysis of the two main experimental interaction cross sections (angular distributions of the differential cross sections and total reaction cross sections) for weakly bound lithium (Li6-9, Li-11) nuclei in the framework of Kox parameterization and the macroscopic optical model. We identified specific features of these interactions and predicted the experimental trend in the total reaction cross sections for Li isotopes at energies close to the Coulomb barrier.