Elastic and inelastic scattering of ¹⁵N ions by ⁶Li nuclei at energy 81 MeV

Angular distributions of the elastic and inelastic scattering of ¹⁵N ions by ⁶Li nuclei were measured at the energy E_lab( ¹⁵N) = 81 MeV. The data were analyzed within the coupled-reaction-channels method (CRC). The elastic and inelastic scattering, spin reorientation of ⁶Li as well as the one- and two-step transfer reactions were included in the channels-coupling scheme. The potential of Woods - Saxon form (WS) and double folded potential DF for the ¹⁵N + ⁶Li nuclei interaction were used in CRC-calculations. The WS potential parameters, deformation parameters of ⁶Li and ¹⁵N nuclei were deduced and the information about the role of other processes in the ¹⁵N + ⁶Li elastic and inelastic scattering was obtained. Spectroscopic amplitudes of nucleons and clusters, calculated according to a translational invariant shell model, were used in the CRC-calculations. It was established that the potential scattering and the ⁶Li spin reorientation are dominated in the ¹⁵N + ⁶Li elastic scattering. Contributions from particle transfers in this scattering were negligible. Comparing the ¹⁵N + ⁶Li and ¹⁵N + ⁷Li elastic scattering at the energy E_lab( ¹⁵N) = 81 MeV, it was found marked differences between the experimental data and interaction potentials (isotopic effects). (author)