Polarization of Protons Elastically and Inelastically Scattered inG5Emulsion

Abstract

Measurements have been made of the polarization resulting from both the elastic and inelastic scattering of high-energy protons in Ilford $G5\mathrm{}$ emulsion. The elastic polarization was measured by measuring the azimuthal asymmetry of the elastic scattering in emulsion of 0.64±0.04 polarized, 310±5 Mev protons from the University of Chicago synchrocyclotron. The average polarization resulting from elastic scattering between 3° and 15° in the laboratory system is 0.44±0.13. Emulsion was exposed to a 0.76±0.03 polarized, 316±4 Mev proton beam from the Berkeley synchrocyclotron for the measurement of polarization due to inelastic scattering. The light prongs of the stars produced in the emulsion show a definite asymmetry. This asymmetry is increased by requiring of the light prongs an angle-energy correlation consistent with quasi-elastic scattering. The data indicate that the polarization decreases with larger prong number stars. From the 304 meters of track scanned in the measurement of elastic polarization, data have been collected on the cross sections of 305±5 Mev protons in $G5\mathrm{}$ emulsion.