Measurement of the thermal-neutron-induced fission cross-section of 238U

P. D'hondt, C. Wagemans, A. Emsallem, R. Brissot

    Research outputpeer-review

    Abstract

    The thermal-neutron-induced fission cross-section of 238U was measured at an intense and very clean thermal-neutron beam of the Grenoble high-flux reactor. The best 238U sample material used contained only 12 ppb of 235U. The fission fragments were detected with surface barrier detectors. Relative to a thermal fission cross-section of 587.6 barn for 235U, a value of (11 ± 2) μbarn was obtained for the 238U fission cross-section. By comparing this result with 238U(n, f) measurements in the resonance region, the existence of a negative resonance or resonances in 239U is demonstrated.

    Original languageEnglish
    Pages (from-to)485-488
    Number of pages4
    JournalAnnals of nuclear energy
    Volume11
    Issue number10
    DOIs
    StatePublished - 1984

    ASJC Scopus subject areas

    • Nuclear Energy and Engineering

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