Proton-Proton Scattering from 1.4 to 2.4 Mev

Differential cross sections for the scattering of protons by protons have been measured at energies of 12- to 90 deg in the center-of-mass system. Total uncertainties vary from about plus or minus 0.1% at large angles to plus or minus 0.3% at the smallest angles. A thorough investigation of sources of error has yielded cross-sectdon values in disagreement with previously published values. A simple phase-shift analysis has been made. Withoui the inclusion of vacuum polarization contributions, a satisfactory fit is not obtained with only S- wave and effective nuclear P-wave phase shifts. With their inclusion, the data are fitted well by pure S-wave nuclear scattcring. An upper limit on the magnitude of the effective nuclear P-wave phase shift is estimated at about 0.02 deg at these energies. (auth)