NEUTRON-PROTON ELASTIC-SCATTERING SPIN-SPIN CORRELATION PARAMETER MEASUREMENTS BETWEEN 500 AND 800 MEV .3. MIXTURES OF C-SS, C-LS, C-LL, AND C-NN

Measurements are presented for several mixtures of the spin observable s C-SS, C-SL = C-LS, C-LL, and C-NN for neutron-proton elastic scatter ing. These data were obtained with a free polarized neutron beam, a po larized proton target, and a large magnetic spectrometer for the outgo ing proton. The neutron beam kinetic energies were 484, 567, 634, 720, and 788 MeV Combining these results with earlier measurements allows the determination of the pure spin observables C-SS, C-LS, and C-LL at 384, 634, and 788 MeV for c.m. angles 25 degrees less than or equal t o theta(c.m.)less than or equal to 180 degrees and at 720 MeV for 35 d egrees less than or equal to theta(c.m.)less than or equal to 80 degre es. These data make a significant contribution to the knowledge of the isospin-0 nucleon-nucleon scattering amplitudes.