Measurement and analysis of the 241Am neutron capture cross section at the n_TOF facility at CERN

n_TOF Collaboration, Jonathan Billowes, James Ryan, Timothy Ware, Tobias Wright

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The 241Am(n,γ) cross section has been measured at the n_TOF facility at CERN with the n_TOF BaFTotal Absorption Calorimeter in the energy range between 0.2 eV and 10 keV. Our results are analyzed as resolved resonances up to 700 eV, allowing a more detailed description of the cross section than in the current evaluations, which contain resolved resonances only up to 150–160 eV. The cross section in the unresolved resonance region is perfectly consistent with the predictions based on the average resonance parameters deduced from the resolved resonances, thus obtaining a consistent description of the cross section in the full neutron energy range under study. Below 20 eV, our results are in reasonable agreement with JEFF-3.2 as well as with the most recent direct measurements of the resonance integral, and differ up to 20–30% with other experimental data. Between 20 eV and 1 keV, the disagreement with other experimental data and evaluations gradually decreases, in general, with the neutron energy. Above 1 keV, we find compatible results with previously existing values.
    Original languageEnglish
    JournalPhysical Review C (Nuclear Physics)
    Early online date24 May 2018
    DOIs
    Publication statusPublished - 2018

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