Study of ⁷Li+¹¹B phenomenological optical model potentials

Angular distributions of ⁷Li+¹¹B elastic scattering were measured at E_lab (⁷Li) = 9.85, 13.3, 18.3, 23.3 and 28.3 MeV within the angular range of θ_c.m. ≈ 15°∼80°. The analyse of these angular distributions together with the data taken from literatures at E_lab (⁷Li) = 34 MeV have been performed to extract the parameters of optical model potential. With the fixed geometrical shapes, the potential strengths show a concise relation to the reaction energy: the depths of real potential decrease linearly with energy increasing, whereas the depths of imaginary part just slightly vary around the average value of 10.35 MeV. (authors)