Two theoretical potential models and the elastic scattering ofO16fromCu63,65at 40-46 MeV

Experimental differential cross sections for the elastic scattering of ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ from ${}_{}{}^{63}{}_{}{}^{}\mathrm{Cu}$ at $E_{\mathrm{lab}}=40, 42, \mathrm{and} 46$ MeV and ${}_{}{}^{65}{}_{}{}^{}\mathrm{Cu}$ at $E_{\mathrm{lab}}=41\mathrm{} \mathrm{and} 46$ MeV are presented. The data are analyzed using a four parameter Woods-Saxon optical potential. Optical parameters are presented and it is verified that the experimental data are sensitive to the value of the real nuclear optical potential [$\mathrm{Re}{U}_{\mathrm{opt}}^N\mathrm{}\left(r\right)\mathrm{}$] and its slope near the strong absorption radius ($D_{\frac{1}{2}}$). Fits to the data are also obtained using the real nuclear potentials given by two theoretical models—the adiabatic model of Nix and collaborators and a $G$-matrix double folding model. The potentials from the $G$-matrix model give a better description of the data than the potentials from the adiabatic model. The latter have too small a slope. A possible explanation for this deficiency is suggested.