Spin Correlation Parameter Cyy of p + 3He Elastic Backward Scattering at Intermediate Energy

It is possible to use nucleon-nucleus scattering as a probe of the spin structure of the nuclei since target related observables are extremely sensitive to spin dependent parts of the target wave function. In addition, one can gain information about the nucleon-nucleus reaction mechanism, the spin dependent nucleon-nucleon interaction in the nuclear medium, and off-shell behavior of the nucleon-nucleon amplitudes. For He-3(p,He-3)p elastic backward scattering, only small Amount of data points exist for the differential cross section and no data exist for spin dependent observables. We developed a spin exchange type polarized He-3 target and measured the spin correlation parameter C-yy at 200, 300, and 400 MeV.