Various Effects on the Nonrelativistic DWIA for (p, 2p) Reactions

We study various effects on both the analyzing powers and the cross sections for the (p,2p) reactions. Numerical calculations with the nonrelativistic distorted wave impulse approximation are carried out for the cross sections and the analyzing powers for the 40Ca(p, 2p)39K reaction at 101.3, 200 and 300 MeV using the effective nucleon· nucleon interaction. We take into account both the effect of the spin·orbit interaction for the distorted waves and the off-shell effect of the proton-proton scattering. It is found that the data for 101.3 and 200 MeV are in good agreement with our calcula'tions. However, in the case of 300 MeV, significant discrepancies between the experimental results and the calculated ones have been shown. We study the sensitivity to the choices of distortion parameters of the optical potentials. Also, for the first time we examine nonlocality effects for both the distorted wave functions and the bound state ones. Finally we study the effects of relativistic corrections in the distorted wave functions and factorization corrections. The incident energy dependence of the various corrections to the cross section and the analyzing power was found not to be so large. Although the inclusion of the various corrections has some effects upon the NR-DWIA calculations, it does not significantly affect the quality of the agreement with the data of 300 MeV.