PROTON-PROTON ANALYZING POWER AND SPIN CORRELATION-MEASUREMENTS BETWEEN 250 AND 450 MEV AT EQUAL-TO-THETA(CM)LESS-THAN-OR-EQUAL-TO-90-DEGREES WITH AN INTERNAL TARGET IN A STORAGE-RING

We have measured the pp spin correlation coefficients A(xx), A(yy), A( xz) and the analyzing power A(y) at 250.0, 280.0, 294.3, 310.0, 350.0, 399.1, and 448.9 MeV over the laboratory angular range 3.5 degrees-43 .5 degrees (theta(c.m.) =7 degrees-90 degrees). The statistical accura cy is approximately +/-0.006 for A(y) and +/-0.02 for A(mn) per 1 degr ees angle bin, while the corresponding scale factor uncertainties are 1.3 and 2.5 %, respectively. The experiment makes use of a polarized h ydrogen gas target internal to a proton storage ring (IUCF Cooler) and a circulating beam of polarized protons. The method of calibration re lative to pp spin correlation coefficients and analyzing power at 197. 4 MeV, the injection energy, involves up and down ramping of the energ y of the polarized beam. The data are compared to recent pp partial wa ves analyses and NN potential models, emphasizing in particular the en ergy dependence in the region of the pion production threshold. [S0556 -2813(98)01510-6].