Polarization in 217-Mevp−nandp−pScattering

Abstract

In a continuation of a general study of the nucleon-nucleon interaction, the polarization in 217-Mev quasi-elastic $p-n$ scattering from deuterium was measured by C${\mathrm{D}}_2$-C subtraction. These data cover the angular range 40°-120° (c.m. system) and are in fairly good agreement with the predictions of the phase-shift analysis of Breit et al. The polarization in elastic $p-p$ scattering was measured in the angular range 30° to 90° (c.m. system) at an energy of 210 Mev using a liquid hydrogen target, and from 60° to 120° (c.m. system) at 217 Mev using C${\mathrm{H}}_2$-C subtraction. These two measurements are in agreement over their common angular range but differ somewhat from the earlier measurements of Baskir et al. The data are somewhat better fitted by the predictions of the boundary-condition model of Bryan, Saylor, and Marshak than by the latest phase-shift analyses of Stapp, Moravcsik, and Noyes, and of Breit et al. The polarization in 217-Mev quasi-elastic $p-p$ scattering from deuterium was measured over the angular range 60° to 110° (c.m. system) by C${\mathrm{D}}_2$-C subtraction; these data agree with our elastic $p-p$ polarization results within the statistical precision of the measurements (about 1.5%).