PARAMETERS OF OPTICAL POTENTIAL IN p+11Li ELASTIC SCATTERING AT 62 MeV

Abstract

This paper is a calculation of the differential cross section for the elastic scattering of hydrogen nuclei on exotic nuclei of a neutron-rich lithium-11 isotope by determining the optimal parameters of optical potential via the FRESCO 2.8 software using the strongly coupled nuclear reaction channel method with the spin-orbit and Coulomb interaction included. For lithium, the J^P=3/2⁻- state was selected. The shapes of the elements of the scattering potential were chosen in the Woods-Saxon form. The selection of the parameters of the potential was based on the data extracted from the p+¹¹Li scattering experiment conducted at 62 MeV in the laboratory coordinate system on the RIKEN cyclotron in Japan in 1992. In this work, it was found that the volume and spin-orbital parts of the potential, as well as the diffusion of the interaction, have values of zero or close to zero. The resulting cross section in the forward hemisphere of scattering is 70–75 times largerтthan the corresponding Rutherford cross section, and in the rear hemisphere, on the contrary, Coulomb forces dominate. The theoretical values confidently coincide with the experimental ones.