Polarization parameters A sub 000 n and A sub 00 nn in elastic proton-proton scattering in the energy region 690--890 MeV

An experiment has been performed to measure the asymmetry {ital A}{sub 000{ital n}} and the polarization correlation coefficient {ital A}{sub 00{ital nn}} in elastic proton-proton scattering at energies 690, 850, and 890 MeV. A comparison of the data obtained with the predictions of the phase-shift analysis of Hoshizaki {ital et} {ital al}. is presented. The ratio of the contributions of triplet and singlet interactions to the {ital pp}-scattering elastic cross section at angle 90{degree} is obtained at energy 690 MeV. Preliminary data are given on the behavior of the {sup 1}{ital D}{sub 2} and {sup 3}{ital F}{sub 3} phase shifts obtained in a phase-shift analysis at energies 850 and 890 MeV carried out with inclusion of the data of the present work.