Microscopic optical potential with two and three body forces for nucleon-nucleus scattering

The proton - nucleus optical potentials generated by folding the calculated complex, density and energy dependent g- matrices (with and without three-body forces (TBF): Urbana IX (UVIX) and TNI) over the target nucleon density distributions obtained from the relativistic mean field theory, are used for the calculation of the differential cross section dσ / dθ, polarization A_y, spin rotation function (Q). for 65 and 200 MeV polarized proton incident on ⁴⁰Ca and ²⁰⁸Pb. The agreement with the experiment is rather impressive. It is found that the inclusion of TBF (Urbana IX)UVIX) and TNI) reduces the strength of the central part of the optical potential in the nuclear interior and affects the calculated spin-orbit potential only marginally and leads to an improvement in the agreement with the corresponding experimental results.