Apparatuses for detecting neutrons, and methods for fabricating such apparatuses, are provided. The neutron detection apparatus includes a cell configured to hold water. Further, the neutron detection apparatus provides a source of one or more high barns isotopes positioned in the cell and configured to absorb neutrons. Neutron absorption by the high barns isotope in the presence of water causes the formation of H.sub.2O.sub.2. Further, the presence of H.sub.2O.sub.2 in the cell indicates exposure of the cell to neutrons.