| 摘要 |
FIELD: analysis of nuclear materials. ^ SUBSTANCE: photon radiation of the tested sample and the counting rates I0 and I1 are measured for the gamma-radiation line of 235 U with the energy of 185,7 keV and the distinctive X-ray emission line U K1, the counting rate is measured for gamma-emission lines which occur during the fission of 235U, with energies higher and lower the line U K1 (98,4 keV). The detection efficiency correlation is calculated for gamma-emission lines of 235 U and the line with energy of 185,7 keV, the approximation of received correlation values for detection efficiency defines the ratio 1 of the detection efficiency for line U K1 and the line with energy of 185,7 keV, while the uranium enrichment R is defined by soling the following equation: ^ aR2-[a-b-(c/1)(I1/I0)]R-b=0 ^ where R is uranium enrichment; a, b, c are the constant coefficients; 1- is the ratio of detection efficiencies for the line U K1 and the line with energy of 185,7 keV; I1 and I0 are the measured counting rates for the line U K1 and the line with energy of 185,7 keV. ^ EFFECT: improved uranium enrichment measurement. ^ 1 dwg, 2 tbl |
