Spin observables in elastic np interaction in the energy range 230–590 MeV. Complete experiment

In experiments on the measurement of values of spin observables in elastic neutron-proton (np) interaction in the neutron energy range 230–590 MeV using polarized neutron beams and polarized proton targets at the Paul Scherrer Institute (PSI), 16 spin observables have been investigated: analyzing power A_00n0; polarization of recoil particles P_0n00; polarization correlation coefficients A_00nn, A_00ss, A_00sk, A_00kk; polarization transfer coefficients K_0nn0, K_0ss0, K_0sk0; depolarization coefficients D_0n0n, D_0s0s, D_0s0k; and three-index spin coefficients N_0nkk, N_0skn, N_0ssn, N_0sns for scattering angles in the center of mass system of 60°–164°. Results: of these investigations present a complete set of precision data on elastic np scattering, which together with the complete set of data for elastic proton-proton (pp) scattering obtained earlier makes the basis for unambiguous determination of the amplitudes of the elastic nucleon-nucleon (NN) scattering matrix for the channel with the isotopic spin I = 0 and provides a possibility of description of the process of NN interaction in a model-independent way.