Proton-Proton Scattering at 10 Mev

Differential cross sections have been measured for scattering of 9.69-Mev protons by hydrogen gas, covering the laboratory angular range from 45^∘{} to 5^∘{}. The angular resolution is ±{}{}^∘{} at small angles, and estimated absolute probable errors ±{}0.7% except at the smallest angles. The interference minimum of 51.4 millibarns occurs at 34^∘{} c.m. and the 90^∘{} cross section is 54.6 mb. The data can be fit with the following set of phase shifts: ¹S₀=54^∘, ³P₀=+2.83^∘, ³P₁=-5.07^∘, ³P₂=+2.22^∘, ¹D₂=+0.2^∘.