Dirac coupled channel analyses of the 800MeV proton inelastic scatterings from $^{22}$Ne

Dirac analyses are performed for the 800MeV proton inelastic scatterings from an s-d shell nucleus $^{22}$Ne using the optical potential model. Dirac coupled channel equations are solved numerically using the sequential iteration method by varying the optical potential and deformation parameters, using a computer code called ECIS. Dirac equations are reduced to obtain Schroedinger-like second-order differential equations and the obtained effective central and spin-orbit optical potentials are analyzed and compared with those of other s-d shell nuclei such as$^{20}$Ne, $^{24}$Mg and $^{26}$Mg. It is found that relativistic analyses based on Dirac equation could describe the experimental data for the 800 MeV proton inelastic scatterings from $^{22}$Ne reasonably well. The surface-peaked phenomena are observed for the real parts of effective central potentials for the scattering from $^{22}$Ne, as shown in the case of $^{20}$Ne and $^{24}$Mg. Dirac phenomenological results for the deformation parameters for 2$^{+}$ and 4$^{+}$ states of $^{22}$Ne agree well with the results of the nonrelativistic calculation using the same W-S potential shape.