Registration of Gamma Rays from the Reaction O(n,p)n on the Direct Neutron Beam of Cascade Generator Kg-2.5

In the present work the results of analysis of the oxygen content in the water with the help of gamma-rays registration from the reaction 16O(n, p)16N is described. The samples were installed permanently on the direct beam of neutrons generated by the reaction 7Li(d, n) in the cascade generator KG-2.5 (IPPE). A comparison was carried out with experimental data obtained by the activation method in similar experimental conditions. The method of determination of oxygen in the samples is based on the reaction O(n,p)N(β-). A beam of neutrons generated in the reaction Li (d,n) on the cascade generator KG-2.5 was used for irradiation of the sample. The energy distribution of neutrons from the target in the case of deuterons with an energy of 0.7 MeV is shown in Figure 1. There is a homogeneous group of neutrons in the region of 14 MeV (the channel of reaction Li(d,n)Be) and a continuous spectrum of neutrons with energies ranging from very small up to 14 MeV. The total neutron yield from this reaction for deuterons with an energy of 1 MeV and a thick target is about 3·10 neutrons/μA/sr. 2 4 6 8 10 12 14 16 18 20 0 30 60 90 120 150 180