Tensor force and NN scattering with polarized beam and target

Expressing the NN scattering matrix in terms of irreducible tensor amplitud es which are directly related to the central interaction in the singlet cha nnel and the central, spin-orbit and tensor interactions in the triplet cha nnel, we show how incisive information can be gathered about the NN interac tion and in particular about tensor interactions at low energies by measuri ng the differential cross-section employing polarized beam and target with appropriate geometries.