On the spin-orbit deformation in inelastic scattering of polarized protons at intermediate energy

Coupled-channels analyses of both cross-sections and analysing powers data have been performed for low-lying states for 160(p vector, p), 180(p vector, p) at 0.8 GeV and 12C (p vector, p') obtained for an energy range between 398 MeV and 697 MeV to study the importance of the deformed Spin-orbit potential. The angular distributions of Ay are very well reproduced only with a full Thomas Spin-orbit potential. The calculations for 160 and 180 data have shown that the deformed Spin-orbit term has only minor effect on the inelastic angular distributions and for Ay these calculations strongly suggest that the central and the Spin-orbit deformations should be equal. On the other hand a different behavior is observed for 12C(p vector, p'): first the presence of the deformed Spin-orbit term is essential to reproduce not only analysing power data but also inelastic angular distributions and secondly, for all energies investigated the deformation of the Spin-orbit potential should be greater than that of the central potential