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Article
Comparison of k 0 NAA analysis results of four different reference materials using six various materials for comparator factor calculation
This study compares the analytical performance of several existing materials as k 0-NAA comparator materials (Al-0.1 % Au, Al-0.1 % Ag, Al-1.0 % Co and Al-2.0 % Sc) with the new Al-0.1 % A...
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Article
Experimental k 0 and k 0-fission factors for the determination of the n(235U)/n(238U) enrichment levels and correction for 235U fission interferences in samples containing uranium
In 2010 we investigated the applicability of the current k 0 and k 0-fission factors for the determination of the n(235U)/n(238U) isotopic ratio in multi-elemental samples containi...
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Article
Experimental determination of Q 0 factors and effective resonance energies with a multi-channel approach: the α-vector method
Some of the Q 0 and Ē r factors from the 2003 to 2012 recommended k 0-datasets were adopted from older literature (Lit; before 1984), at the time of the launch of t...
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Article
Experimental determination of k 0, Q 0 factors, effective resonance energies and neutron cross-sections for 37 isotopes of interest in NAA
The recommended k 0 nuclear data from 2003 has been re-investigated by some authors during the last decade, motivated by some discrepancies that were systematically observed during the analysis of...
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Article
Measurement of k 0 and Q 0 values for iridium isotopes
There is an increasing demand for the chemical analysis of new materials containing iridium. The k 0-method is an excellent method for the analysis of new materials but measured k
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Article
k0-INAA of Venezuelan ceramics and complete statistical analysis to establish their provenance
A group of 46 archaeological figurines samples (ad 1300 and 1500) from Venezuelan mainland and northern island were analyzed by k0-instrumental neutron activation analysis (k0-INAA) to obtain their elemental cont...
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Article
Experimental determination of k 0 , Q 0 , \( \bar{E}_{r} \) factors and neutron cross-sections for 41 isotopes of interest in Neutron Activation Analysis
The k 0 -literature has been reviewed every decade but some of its nuclear data is still more than 30 years old. Sometimes Q 0
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Article
Experimental determination of k 0 nuclear data for the cesium radionuclides
The current (official) k 0 nuclear data for the cesium radionuclides was determined circa 1987 and was partially adopted from older literature. In this work we aimed at the redetermination of expe...
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Article
Experimental validation of some thermal neutron self-shielding calculation methods for cylindrical samples in INAA
Neutron self-shielding has been a factor of concern in the history of Instrumental Neutron Activation Analysis. When the sample to be analyzed cannot be made small enough in size and/or sufficiently diluted, t...
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Article
The impact of polyethylene vials on reactor channel characterization in k 0 -NAA
Reactor channel characterization is commonly performed by irradiating bare and cadmium-covered “fluence rate monitors”, avoiding as much as possible the use of irradiation vials and spacers to position the mon...
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Article
Trace element determination in beauty products by k 0-instrumental neutron activation analysis
A recent study on trace elements in beauty products and cosmetics sold on the Asian market has shown the presence of high levels of U, Th and rare earth elements in so called “Hormesis cosmetics.” For the purp...
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Article
Validation of the determination of tin by k 0-instrumental neutron activation analysis in foodstuff
Several recent intercomparisons and certification exercises have shown that the determination of tin in e.g. food samples and plastics is not straightforward. k 0-Instrumental Neutron Acti...
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Article
Neutron spectrum calibration using the Cd-ratio for multi-monitor method with a synthetic multi-element standard
Several methods are in use for the determination of the thermal to epithermal neutron fluence rate ratio (f) and the deviation of the epithermal neutron spectrum from the 1/E shape parameter (α). In our former wo...
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Article
Using synthetic multi-element standards (SMELS) for calibration and quality control of the irradiation facilities in the BR1 reactor
The thermal to epithermal neutron flux ratio (f) and the deviation of the epithermal neutron spectrum from the 1/E shape (α) are essential parameters for the correct application of k 0-sta...
