Measurement of polarization and differential cross section in p-4He elastic scattering between 25 and 29 MeV

Abstract p- 4 He polarization and elastic differential cross-section angular distributions have been measured at 25.0, 26.1, 27.1. 28.2 and 29.2 MeV incident proton energy. The angular distributions were measured in 5° intervals from 20° to 160° (lab) for the polarization and from 30° to 160° (lab) for the differential cross section. The polarization measurements were generally such that δ p ≦ ±0.03 whilst the differential cross-section errors were ≦3% except at forward angles. The normalization accuracies were determined to be ±1% for the polarization and ±3.5% for the differential cross section.