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), ($p, p^{\prime }$), ($p, d$), ($p, t$), and ($p, \alpha$). These data are combined with previously measured ($p, \mathrm{xn}$) 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 ${\mathrm{U}}^{233}$, ${\mathrm{U}}^{235}$, and ${\mathrm{U}}^{238}$, respectively. Angular distributions of ($p, p^{\prime }$), ($p, d$), ($p, t$), ($p, \alpha$), and proton elastic scattering cross sections are shown for ${\mathrm{U}}^{235}$ and ${\mathrm{U}}^{238}$.