COMPLETE ANGULAR-DISTRIBUTION MEASUREMENTS OF PP SPIN CORRELATION PARAMETERS A(XX), A(YY), AND A(XZ) AND ANALYZING POWER A(Y) AT 197.4 MEV

Measurements of pp spin correlation coefficients A(xx), A(yy), and A(x z) and analyzing power A, for yp elastic scattering at 197.4 MeV over the laboratory angular range 3.5 degrees-43.5 degrees (0(c.m.)= 7 degr ees- 90 degrees) have been carried out. The typical statistical accura cy per 1 degrees angle bin is better than 0.02 for the A(mn) and bette r than 0.005 for A(y). Systematic errors are negligible except for an overall normalization uncertainty of 2.5% for A(mn) and 1.3% for A,. T he experiment makes use of a polarized hydrogen gas target internal to a proton storage ring (IUCF Cooler) and a circulating beam of polariz ed protons. The target polarization is switched in sign and direction (x, y, z) every 2 s by reversing a weak guide field (approximate to 0. 3 mT). Scattered and recoil protons are detected in coincidence by two sets of wire chambers, by scintillators, and by silicon-strip recoil detectors placed 5 cm from the proton beam. Analysis methods and compa rison to recent pp partial-wave analyses and NN potential models are d escribed.