The multiangle track technique is used to measure in detail the angula
r distributions of fragments from U-233 fission and the energy depende
nce of the ratio of the cross sections for U-233 and U-235 fission ind
uced by neutrons of energies 0.02-6.38 MeV. The fission fragments are
detected by cylindrical glass detectors. Pronounced irregularities of
the angular anisotropy are observed in the entire neutron-energy range
under investigation.