Two-proton correlation measurements in 800 and 400 MeV/nucleon heavy-ion reactions

Energy and angular correlations of two protons emitted in collisions of C + C, C + Pb, Ne + NaF, Ar + KCl, at E lab beam = 800MeV/ A , and Ne + NaF at E lab beam = 400MeV/ A have been measured. A strong correlation due to p-p quasi-elastic scattering is observed except for C + Pb where nuclear shadowing is observed. A simple model is proposed to estimate the magnitude of the knock-out process in these heavy-ion collisions.