Low-Lying Levels inU238Excited by Inelastic Neutron Scattering

Analysis of neutrons inelastically scattered by ${\mathrm{U}}^{238}$ indicates that the first two excited states in ${\mathrm{U}}^{238}$ are at 50±20 kev and 140±25 kev. The inelastic collision cross sections, the total inelastic scattering cross sections, and the partial inelastic scattering cross sections for the excitation of these levels are presented for neutron energies of 150, 250, and 500 kev.