Measurement of the 236U(n,f) Cross Section in the Neutron Energy Range from 0.5 eV up to 25 keV

Cyriel Wagemans, Liesbeth De Smet, Sofie Vermote, Jan Heyse, Jaak Van Gils, Olivier Serot, Jan Wagemans

    Research outputpeer-review


    The 236U(n,f) cross section has been measured in the energy range from 0.5 eV to 25 keV at the Geel Electron Linear Accelerator neutron time-of-flight facility of the Institute for Reference Materials and Measurements in Geel, Belgium. A highly enriched 236U sample was mounted back-to-back with a 10B sample in the center of a Frisch-gridded ionization chamber, hence realizing a 2pi detection geometry. A 235U(n,f) cross-section control measurement was performed in the same experimental conditions. Special attention has been given to the fission resonance integral I_f and to the strongest resonance at 5.45 eV, for which a resonance analysis has been performed yielding Gamma_f = 1.7 µeV. Both values are highly overestimated in the literature.
    Original languageEnglish
    Pages (from-to)200-206
    JournalNuclear Science and Engineering
    Issue number2
    StatePublished - 1 Oct 2008

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