Spin correlation parameter and analyzing power inn-pelastic scattering at intermediate energies

In order to improve existing I=0 phase shift solutions, the spin correlation parameter $A_{\mathrm{NN}}$ and the analyzing powers $A_{0N}$ and $A_{N0}$ have been measured in n-p elastic scattering over an angular range of 50°–150° (c.m.) at three neutron energies (220, 325, and 425 MeV) to an absolute accuracy of ±0.03. The data have a profound effect on various phase parameters, particularly the ${}_{}{}^1{}_{}{}^{}\mathrm{P}_1^{}{}_{}{}^{}$, ${}_{}{}^3{}_{}{}^{}\mathrm{D}_2^{}{}_{}{}^{}$, and ${\epsilon }_1$ phase parameters which in some cases change by almost a degree. With the exception of the highest energy, the data support the predictions of the latest version of the Bonn potential. Also, the analyzing power data ($A_{0N}$ and $A_{N0}$) measured at 477 MeV in a different experiment over a limited angular range [60°–80° (c.m.)] are reported here.