Scattering of 37-Mev Positive Pions on Hydrogen

Measurements have been made of the differential scattering cross sections of positive pions on hydrogen at 37 Mev using a liquid hydrogen target and scintillation counters. Scattered pions are separated from other particles in the background by measuring the mass and energy of the particles using a pulse-height analysis on the signals from the scintillation counters. A partial wave analysis is made of the experimental results assuming $S$- and $P$-wave scattering. The results obtained are ${\alpha }_3=-4.11\mathrm{}\pm 1.09$ deg, ${\alpha }_{33}=3.12\mathrm{}\pm 0.79$ deg, and ${\alpha }_{31}=-0.32\mathrm{}\pm 0.73$ deg.