Polarization inp−αScattering

Abstract

The polarization of protons elastically scattered from ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ was measured at a total of 11 points including six different angles and four energies between 6 and 11 MeV. Carbon was used as an analyzer. Excellent agreement was obtained between the present results and the measurements of Brown, Haeberli, and Saladin. A phase-shift analysis at 10 MeV provides evidence for small positive split $d$ waves at this energy with the $d_{\frac{5}{2}}$ phase shift 1 to 2 deg larger than the $d_{\frac{3}{2}}$ phase shift.