FIELD: measuring equipment.
SUBSTANCE: invention relates to measurement equipment. Method of determining weight of oxygen in oxygen containing flow includes irradiation of oxygen-containing flow and gamma-quanta recording. Oxygen-containing flow is irradiated with fast neutrons in pulse mode, gamma-quanta recorded, obtained spectra of recorded gamma-quanta are analysed, number of gamma-quanta with energy 6.13±0.62 MeV from irradiated volume is determined. Time for transfer of irradiated volume is determined as difference of moments of beginning of detecting gamma-quanta and beginning of oxygen containing flow irradiation. Weight of oxygen is calculated from ratio taking into account number of registered gamma-quanta with energy 6.13±0.62 MeV, decay constant for nitrogen-16, time of transfer of irradiated volume from source to detector, efficiency of detector detecting, fast neutron flux density, pulse repetition frequency, pulse duration of irradiation, irradiation time, 16O(n,p)16N reaction section, Avogadro constant and molar mass of oxygen.
EFFECT: technical result is increase in accuracy and faster measurement.
1 cl, 1 dwg
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