Measurement of \(^3\)He Analyzing Power for \(p{-}^{3}\)He Elastic Scattering at \(70~\mathrm{MeV}\)

The \(^3\)He analyzing powers for \(p{-}^3\)He elastic scattering with the polarized \(^3\)He target have been measured at \(70~\mathrm {MeV}\). \(^3\)He polarization which was calibrated by the electron paramagnetic resonance method was achieved to \(50\%\). In the conference the data were compared with the theoretical calculations based on the modern nucleon–nucleon potentials. Large discrepancies between the theoretical calculations and the experimental data were found at the angles where the \(^3\)He analyzing power takes minimum and maximum.