Nuclear Science and Engineering / Volume 29 / Number 1 / July 1967 / Pages 1-6
Technical Paper / dx.doi.org/10.13182/NSE67-A17804
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Samples of uranium enriched in 233U and in 235U have been irradiated with cobalt monitors in high-flux facilities in both cadmium-covered and bare assemblies. Radiometric analyses of irradiation samples provide data concerning thermal and epithermal capture and fission reactions from which experimental results are obtained. The epithermal capture-to-fission cross-section ratios of 233U and 235U at infinite dilution are 0.175 ± 0.006 and 0.499 ± 0.016, respectively, for a l/E spectrum with a low-energy cutoff of 0.50 eV. Resonance integrals for capture and fission are evaluated in terms of cobalt cross sections.