Total Reaction and Elastic Scattering Cross Sections for 22.8-Mev Protons on Uranium Isotopes

The total reaction cross sections for 22.8-Mev protons on uranium isotopes were determined by measuring cross sections for (p, fission), (p, p^'), ($p, d$), ($p, t$), and (p, α). These data are combined with previously measured (p, xn) cross sections to give total reaction cross sections of 1.43±{}0.10, 1.44±{}0.10, and 1.39±{}0.10 barns for 22.8-Mev protons on U²³³, U²³⁵, and U²³⁸, respectively. Angular distributions of (p, p^'), ($p, d$), ($p, t$), (p, α), and proton elastic scattering cross sections are shown for U²³⁵ and U²³⁸.