NUCLEON-NUCLEON BOUND-STATE CONTRIBUTION TO THE PROTON-SCATTERING BY NUCLEI

Sensitivity of proton-nucleus scattering is studied to the off-shell b ehavior of the nucleon-nucleon (NN) effective interaction, particularl y to the presence of the NN bound state. The effect is found to be neg ligible in a kinematical region where an optimal factorization approxi mation is justified. A sensitivity can be seen below 100 MeV of beam e nergy and for the light nuclei (C-12, O-16). The effect is more pronou nced for a tensor part of the NN t matrix which is shown in the charge -exchange cross section of proton scattering from C-13.