k0-measurements and related nuclear data compilation for (n, γ) reactor neutron activation analysis

Moëns, Luc; Corte, F. De; Wispelaere, A. De; Hoste, J.; Simonits, A.; Elek, A.; Szabó, Endre

doi:10.1007/bf02037061

Cited by 175 publications

(7 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analysis for 94 nuclides used in NAA showed that the uncertainties of their effective resonace energy are from 0 to 20%, except 75 As (34%) [4]. In this measure, we are able to realize that the effect of them on NAA result is also negligible.…”

mentioning

confidence: 50%

“…The detector's efficiency (ε p ) can be determined with an uncertainty about 2%; but the uncertainty of α can be more than 10%, even bigger, depend on the irradiation channels in reactor. Since the term [f + 0 (α)]/ [f + Q 0 (α)] in Equation (1), it is clear that an additional parameter, Q * ri , should be considered, because the uncetainties of E ri E of some nuclides are about 20% [4,5].…”

Section: α  Rimentioning

confidence: 99%

“…The k 0 -factors to Au for interested isotopes in NAA were experimentally determined and tabulated in report [4] with an accuracy which better than 2% (average ~1%). The relevant nuclear data as Q 0i and cific irradiation channel and detector, which are used in practice.…”

Section: α  Rimentioning

confidence: 99%

“…The fundamental concept of k 0 -method was being elaborated previously in great detail [1][2][3]. The concentration of an element in the k 0 -method is calculated by: …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of the Neutron Flux Characteristic Parameters in the Irradiation Channels of Reactor on NAA Results Using k<sub>0</sub>-Standardization Method

Hung¹

2012

AJAC

View full text Add to dashboard Cite

An approximation method using to estimate the influence of the uncertainties of the neutron flux characteristic parameters in the irradiation positions on the NAA results using k 0 -standardization technique was presented. Those are the epithermal reactor neutron spectrum shape-factor α, the effective resonance energy r E for a given nuclide and the thermal to epithermal neutron flux ratio f. The method is applied to estimate the effect of the uncertainties in the determination of α, r E and f on final NAA results for some irradiation channels of the Dalat reactor. It also shows that presented method is suitable in practical use for the estimation of the errors due to the uncertainty of the neutron flux characteristic parameters at the irradiation position.

show abstract

mentioning

confidence: 50%

Section: α  Rimentioning

confidence: 99%

Section: α  Rimentioning

confidence: 99%

“…The fundamental concept of k 0 -method was being elaborated previously in great detail [1][2][3]. The concentration of an element in the k 0 -method is calculated by: …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of the Neutron Flux Characteristic Parameters in the Irradiation Channels of Reactor on NAA Results Using k<sub>0</sub>-Standardization Method

Hung¹

2012

AJAC

View full text Add to dashboard Cite

show abstract

“…The This reconsideration and the calculations carried out using the results of other authors [6,7] made possible to show [8] that: 1. Data in Ref.…”

Section: El+c~mentioning

confidence: 94%

Methodological problems of activation analysis using radionuclide neutron sources

Bakiev

1999

Czech J Phys

View full text Add to dashboard Cite

Simultaneous irradiation of large samples is a special feature of the of neutron activation analysis with radionuclide neutron sources (RNS). Along with working out methodical and technical improvements in this field we have also investigated physical aspects of the analysis with RNS, factors influencing the accuracy of analysis and worked out methods and means of their evaluation. The solution the problem of calibrating the individual irradiation positions for the simultaneous irradiation as well as the problems of accuracy of analysis concerning the absorption and reflection of neutrons are discussed in this paper. I. The problem of the irradiation positions calibration and determination of the position coefficients for multi-element analysis for a simultaneous irradiation of a group of samplesFor the single-element analysis (for example of gold) with the simultaneous irradiation of a group of samples the coefficients characterizing different distances of the irradiation positions from the source (the so-called position coefficients) have to be determined by irradiating samples with an equal content of gold, measuring the gold line intensity for samples from each position, and normalizing to the gold line intensity of the sample nearest to the source.[1].The set-up of the irradiation assembly in the californium source and the position coefficients used for determination of gold [2] are illustrated in Fig. 1.The 54 irradiation position are characterized by six values of position coefficients (three coefficients for the middle layer and three for the upper and lower layers) given by the distance from the source. They are distinguished by indexes I, II, III (middle layer) and 1,2,3 (upper and lower layers).When performing the multielement analysis, a problem arises: is it possible to use the position coefficients determined for one element (e.g., gold) for the determination of another element in the same samples? Or, are position coefficients different for different elements (nuclides) and if they are, how much and why?Because the spectrum of neutrons depends on the distance from the source and the activation parameters of different nuclides (resonance integrals, activation cross sections for thermal neutrons and their ratios) are different and because the degree of the activation decrease (gradient) depends on the distance and can vary for different nuclides, the position coefficients for other elements need not be the same as those for gold.Experimental determination of these coefficients is rather laborious and it can be difficult to obtain them for various nuclides if the differences are small.The detailed investigation of this problem allowed us to understand better the relationship between the position coefficients, the activation parameters of nuclides

show abstract

Determination of metals in polycarbonate foils by energy dispersive x-ray fluorescence methods

ska¹,

Koster²,

Ostachowicz³

et al. 2000

X-Ray Spectrom.

View full text Add to dashboard Cite

Polycarbonate foils with thicknesses from 0.08 to 2.5 mm containing Ti, Cr, Fe and Ba were analysed by energy‐dispersive x‐ray fluorescence (EDXRF) spectrometry. Neutron activation analysis (NAA) was used to validate the EDXRF results. The element concentrations ranged for Ti from 0.04 to 0.75%, for Cr from 0.03 to 0.3% and for Fe from 0.25 to 1.30%. The concentration of Ba was about 1%. The results obtained by EDXRF were of the same quality as those provided by NAA, but the NAA method was found to be more accurate for polycarbonate samples containing both Ti and Ba. Copyright © 2000 John Wiley & Sons, Ltd.

show abstract

k0-measurements and related nuclear data compilation for (n, γ) reactor neutron activation analysis

Cited by 175 publications

References 73 publications

Influence of the Neutron Flux Characteristic Parameters in the Irradiation Channels of Reactor on NAA Results Using k<sub>0</sub>-Standardization Method

Influence of the Neutron Flux Characteristic Parameters in the Irradiation Channels of Reactor on NAA Results Using k<sub>0</sub>-Standardization Method

Methodological problems of activation analysis using radionuclide neutron sources

Determination of metals in polycarbonate foils by energy dispersive x-ray fluorescence methods

Contact Info

Product

Resources

About

k0-measurements and related nuclear data compilation for (n, γ) reactor neutron activation analysis

Cited by 175 publications

References 73 publications

Influence of the Neutron Flux Characteristic Parameters in the Irradiation Channels of Reactor on NAA Results Using k&lt;sub&gt;0&lt;/sub&gt;-Standardization Method

Influence of the Neutron Flux Characteristic Parameters in the Irradiation Channels of Reactor on NAA Results Using k&lt;sub&gt;0&lt;/sub&gt;-Standardization Method

Methodological problems of activation analysis using radionuclide neutron sources

Determination of metals in polycarbonate foils by energy dispersive x-ray fluorescence methods

Contact Info

Product

Resources

About

Influence of the Neutron Flux Characteristic Parameters in the Irradiation Channels of Reactor on NAA Results Using k<sub>0</sub>-Standardization Method

Influence of the Neutron Flux Characteristic Parameters in the Irradiation Channels of Reactor on NAA Results Using k<sub>0</sub>-Standardization Method