Understanding of gamma-ray production via neutron interactions on oxygen is essential for the study of neutrino neutral-current elastic interactions in water Cherenkov detectors. A measurement of gamma-ray production from such reactions was performed using a 77 MeV quasi-mono energetic neutron beam. Several gamma-ray peaks, which are expected to come from neutron-16O reactions, are observed and cross sections are measured for three gamma-ray components, 6.13 MeV from 16O(3−), 5.27 MeV from 15N (52+), and 4.44 MeV from 12C(2+). The results are σγ(6.13 MeV) = 4.2 ± 0.1(stat.) ± 0.9(syst.) mb, σγ(5.27 MeV) = 6.4 ± 0.1(stat.) ± 2.2(syst.) mb, and σγ(4.44 MeV) = 8.3 ± 0.1(stat.) ± 1.6(syst.) mb, respectively. These are the first measurement results at the corresponding neutron energy with use of a mono energy beam.
|Publication status||Published - Feb 24 2019|
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