Abstract

Exploration and modification of data for k 0-PGAA (prompt γ-ray activation analysis) values used as standards for k 0 standardization are needed. An integrated system has been installed and calibrated in Hot Laboratories Center for PGAA, using 252Cf isotopic neutron source with neutron flux of 6.16E8 n/cm2 s. The prompt k 0-factors of about 12 elements were determined versus the 1951.1 keV γ-ray of the 35Cl, as well as analyzing crude oil and oil product samples. The concentrations of the elements in crude oil H, B, Mg, Al, Na, Si, P, S, Cl, V and Cd were 1.18E5, 0.084, 5.48E2, 8.45E2 4.88E2, 1.62E2, 3.72E2, 8.2, 144.3, 393 and 209.2 ppm while in oil product samples were 1.32E5, 5.87, 4.56E2, 4.22E2, 7.16E3, 699, 157, 8.74, 492.3, 61 and 198.2 ppm. Validation of the k 0-PGAA was applied in analyzing standard IAEA reference material (soil-7) which give good agreement with the literature data. The 252Cf neutron beam in radiation position was characterized by the cadmium-ratio method, and found that the cadmium ratio (f), was 160.

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