Uranium-235 Thermal Neutron Fission Yields

The absolute yields of six nuclides in the thermal neutron fission of ${\mathrm{U}}^{235}$ have been determined to better than 6 percent, using fission counting and radiochemical techniques. The results are in good agreement with earlier determinations of lower accuracy. They support mass spectrometric indications of fine structure in the yield-mass curve in low-energy nuclear fission.