Measurement of ${\hat{I}}^3$-ray production via the neutron-${}^{16}$O reaction using a 77 MeV quasi-monoenergetic neutron beam

Abstract

Understanding of ${\hat{I}}^3$-ray production via neutron interactions on oxygen is essential for the study of neutrino neutral-current quasielastic interactions in water Cherenkov detectors. A measurement of ${\hat{I}}^3$-ray production from such reactions was performed using a 77~MeV quasi-monoenergetic neutron beam. Several ${\hat{I}}^3$-ray peaks, which are expected to come from neutron-${}^{16}\mathrm{O}$ reactions, are observed and production cross sections are measured for nine ${\hat{I}}^3$-ray components of energies between 2 and 8~MeV. These are the first measurements at this neutron energy using a nearly monoenergetic beam.

17 pages, 20 figures, 5 tables