High Resolution Measurement of the ²³⁴U(n,f) Cross Section in the Neutron Energy Range from 0.5 eV to 100 keV

The ²³⁴U(n,f) cross section has been measured in the energy range from 0.5 eV to 100 keV at the GELINA neutron time-of-flight facility of the Institute for Reference Materials and Measurements in Geel using highly enriched ²³⁴U samples. Two independent measurements were performed: one in a low detection geometry (15% of 2) and another in a 2 detection geometry. A ²³⁵U(n,f) cross-section measurement was performed under the same experimental conditions, allowing a reliable correction for the ²³⁵U(n,f) contribution to the yield. Special attention has been given to the strongest resonance at 5.16 eV and to the fission resonance integral I_f, for which large discrepancies are reported in the literature.