Measurement and resonance analysis of the 33S(n,α)30Si cross section at the CERN n_TOF facility in the energy region from 10 to 300 keV

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

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The
    33
    S
    (
    n
    ,
    α
    )
    30
    Si
    cross section has been measured at the neutron time-of-flight (
    n
    _
    TOF
    ) facility at CERN in the neutron energy range from 10 to 300 keV relative to the
    10
    B
    (
    n
    ,
    α
    )
    7
    Li
    cross-section standard. Both reactions were measured simultaneously with a set of micromegas detectors. The flight path of 185 m has allowed us to obtain the cross section with high-energy resolution. An accurate description of the resonances has been performed by means of the multilevel multichannel
    R
    -matrix code sammy. The results show a significantly higher area of the biggest resonance (13.45 keV) than the unique high-resolution (
    n
    ,
    α
    ) measurement. The new parametrization of the 13.45-keV resonance is similar to that of the unique transmission measurement. This resonance is a matter of research in neutron-capture therapy. The
    33
    S
    (
    n
    ,
    α
    )
    30
    Si
    cross section has been studied in previous works because of its role in the production of
    36
    S
    in stars, which is currently overproduced in stellar models compared to observations.
    Original languageEnglish
    JournalPhysical Review C (Nuclear Physics)
    Volume97
    Early online date4 Jun 2018
    DOIs
    Publication statusPublished - 2018

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