ppelastic analyzing power from 318 to 800 MeV

Abstract

The maximum value of the analyzing power A for pp elastic scattering has been measured at 17' lab as a function of energy from 318 to 800 MeV. No unexpected energy dependent structure is observed at the 0.5%%uo level.NUCLEAR REACTIONS 'H(p, p}'H, E = 318 -800 MeV, measured A at Olab = 17 .The observation of energy dependent structure in proton-proton scattering has generated much interest recently. Significant structure has been observed in the medium energy range in measurements of Aoy, Aol, A~~~a nd ALL . ' The

npelastic spin transfer measurements at 788 MeV

“…The beam-line polarimeters have been calibrated to 1% for a wellfocused beam spot [40]. Experience has shown that with a poorly focused beam the uncertainty increases to 2% as a result of increased contamination by quasifree scattering from carbon in the CH2 targets.…”

Elastic scattering ofN-,L-, andS-type polarized 794 MeV protons from anND3target polarized in theS-Lplane

“…The uncertainties reported for the previous measurements and the overall systematic uncertainty of the target polarization measurement are the main contributors to the systematic uncertainty listed in each column. The systematic uncertainties in the beam ( -1% [19]) and scattered particle's ( -2'%%uo [20]) polarization measurements are not included (see text). were not used in these tests because of the low efficiencies of these chambers (a valid trajectory through each chamber system that supplied any histogram used in the tests discussed above was a prerequisite).…”

“…The uncertainties in these previously measured quantities and the overall uncertainty in the target polarization ( -5% ) are included in the systematical uncertainties reported in Tables I-III. However, the systematical uncertainties in the beam polarization measurement [19] ( -1%) and the scattered particle's polarization measurement [20] (-2%) are not included in the values given in Tables I -III. These should be added to the total uncertainty.…”

“…An empirical parametrization of the azimuthal angle as a function of the scattering angle was obtained, based on the facts that the magnetic field direction was roughly along the direction of the outgoing protons and the scattered deuterons were moving approximately perpendicular to the magnetic field. A least-squares fit of the azimuthal angles by the function derived from a simple magnetic field model gave 0.079 -0.0255/cos0&, b sin(b = sin 0]a (19) where O"b and P are the scattering polar and azimuthal angles in the laboratory frame. Values for the azimuthal angle and polarized target angle for each bin are given in all the tables.…”

“…The spin observables calculated with the values of the parameters listed above and combined in the way denoted by Eqs. (10), (16), and (19) are shown in Figs. 6, 7, and 8 as solid curves.…”