Journal ArticleDOI
On the non-destructive neutron activation determination of uranium by the 106 KeV-γ-peak of neptunium-239
Ivelin Kuleff,D. Todorovsky +1 more
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In this article, the interfering effect of the γ-radiation of radioactive isotopes of the rare earths on the non-destructive neutron activation analysis of μg amounts of uranium, using the 106 KeV-γ-line of 239Np and NaI (Tl). detector, is estimated.Abstract:
The interfering effect of the γ-radiation of radioactive isotopes of the rare earths on the non-destructive neutron activation analysis of μg amounts of uranium, using the 106 KeV-γ-line of 239Np and NaI (Tl). detector, is estimated. The errors introduced by the interfering isotope in the analysis of uranium, are determined as a function of the ratio of the concentration in the sample of the interfering element and uranium. In addition, the possibilities of determining the quantitative effect of these elements are described. The use of the proposed method is demonstrated by the analysis of some geological samples.read more
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Journal ArticleDOI
Multielement analysis of uraniferous rocks by INAA: Special reference to interferences due to uranium and fission of uranium
P. Ila,P. Jagam,G. K. Muecke +2 more
TL;DR: The presence of uranium in a sample enhances the true values of La, Ce, Nd, Sm determined by INAA if appropriate corrections are not made for the interference.
Journal ArticleDOI
Simultaneous determination of uranium and thorium by instrumental neutron activation and high resolution x-ray spectrometry
Mariana. Mantel,Saadia. Amiel +1 more
TL;DR: In this article, a limit of detection of 10/sup -2/ mu g for U and 10 /sup -1/ µ g for Th was obtained by the irradiation of samples (~ 10 to ~ 100 mg) for 20 minutes at a neutron flux of 10.sup 13/n cm/sup 2/Si(Li) and a 4% counting geometry.
Journal ArticleDOI
On the uranium content in some technogenic products potential environmental pollutants
D. S. Todorovsky,I. Kulev +1 more
TL;DR: In this article, the contribution of the phosphoric fertilizers to the uranium content of soil, plants, breeding stock and man has been evaluated by instrumental and radiochemical NAA.
Journal ArticleDOI
Epithermal neutron activation analysis of uranium by neptunium-239 using high resolution gamma-spectrometry
Ivelin Kuleff,K. N. Kostadinov +1 more
TL;DR: In this article, the peak area of overlapping peaks of 153Sm and 239Np is calculated and a scheme for NAA of uranium in geological objects is proposed, which can be used in other similar cases in the practice of NAA.
Journal ArticleDOI
Epithermal neutron activation determination of uranium in environmental waters by neptunium-239 after preconcentration on activated carbon
Ivelin Kuleff,K. N. Kostadinov +1 more
TL;DR: In this paper, a method for the analysis of uranium in natural waters based on preconcentration of uranium on activated carbon, irradiation with epithermal neutrons, and a high resolution gamma-spectrometry of 239Np was developed.
References
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Journal ArticleDOI
Nuclear and Radiochemistry
TL;DR: In this paper, the authors present a survey of nuclear models and their applications in the field of radiation detection and measurement, as well as a discussion of statistical considerations in radioactivity measurements.
Journal ArticleDOI
Instrumental activation analysis of standard rocks with high-resolution γ-ray detectors☆
TL;DR: In this paper, the element abundances in igneous rocks measured by instrumental neutron activation using high resolution lithium drifted germanium detectors were investigated. But the results were limited to a single element.
Journal ArticleDOI
Determination of Gamma-Ray Abundance Directly from Total Absorption Peak
Journal ArticleDOI
Instrumental activation analysis of silicate rocks with epithermal neutrons.
A.O. Brunfelt,E. Steinnes +1 more
TL;DR: In this paper, the determination of trace elements in standard rocks by epithermal neutron activation, followed by γ-ray spectrometry with a Ge(Li) detector, is described.
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