Neutron Scattering Cross Section ofU233

The neutron scattering cross section of ${\mathrm{U}}^{233}$ as a function of energy has been measured by means of a crystal spectrometer in the energy range 0.27 to 0.95 ev and at 2.09, 2.71, and 3.31 ev. Least-squares analyses of these data indicate that at these energies the scattering cross section is approximately constant, i.e., 12.5±0.5 barns.