The nucleon ― nucleon program a Saturne II

The aim of Nucleon-Nucleon program is to obtain the Nucleon-Nucleon amplitudes, either via Phase Shift Analyses or direct reconstruction. To this end, a large number of polarization observales, including spin transfer and 3-spin parameters, have been measured at Saturne II in neutron-proton elastic scattering, between 800 and 1100 MeV, using the free polarized neutron beam, obtained by breaking up of polarized deuterons. The analysis is still in a early stage, but, nevertheless, it has already been possible to reconstruct the neutron-proton amplitudes at 3 angles, at 840 and 880 MeV