| Abstract: | The proton-proton absolute elastic differential cross section, σ[pp](θ), has been measured at incident proton beam energies of 491.9, 575.5, 641.6, 728.2, and 793.0 MeV at laboratory scattering angles of ~15° to ~42° with a total uncertainty on the order of 1%. The measurements were made at the Clinton P. Anderson Los Alamos Meson Physics Facility (LAMOF) and employed a new beam counting technique which provided a better overall beam normalization compared to previous experiments of this type. The cross section was measured with CH2 targets and a primary liquid, LH2, target to determine the uncertainties in some systematic corrections. Extreme care was take to reduce individual systematic errors to less than 0.5%. |
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