Elastic scattering of 56 MeV polarized deuterons from complex nuclei

The elastic scattering of 56 MeV polarized deuterons over a wide mass region has been investigated. The target nuclei were ¹⁶O, ²⁴Mg, ²⁸Si, ³²S, ⁴⁰Ar, ^{40, 44}Ca, ⁵⁴Fe, ^{58, 60, 64}Ni, ⁹⁰Zr, ¹¹⁸Sn and ²⁰⁸Pb. Angular distributions of the cross section and vector analyzing power A_y have been measured for all target nuclei. The tensor analyzing power A_yy has also been studied, except for ²⁴Mg and ²⁸Si. The optical-model parameters were derived from an analysis including no tensor potentials. Volume integrals for the real and imaginary parts of the central potential and the spin-orbit interaction were calculated and compared with the folding-model predictions. The effect of a complex T_R potential was studied. It was found that the real part of the T_R potential tends to be zero for all the nuclei studied and the inclusion of the imaginary part improves the fit to the tensor analyzing power.