Use of the absolute method in neutron activation analysis: application to National Bureau of Standards coal and spinach

1982 ◽  
Vol 60 (17) ◽  
pp. 2278-2280 ◽  
Author(s):  
J. St-Pierre ◽  
L. Zikovsky
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Reference Values ◽  
Gamma Ray ◽  
Direct Calculation ◽  
National Bureau ◽  
Absolute Method ◽  
Analysis Application ◽  
Nuclear Constants

Absolute neutron activation analysis, which consists of gamma-ray counting and direct calculation of weights from nuclear constants, was applied to two National Bureau of Standards materials: coal (SRM 1632a) and spinach (SRM 1570). Al, As, Br, Cl, Co, Cr, Cs, Eu, Fe, Ga, K, La, Mg, Na, Sb, Sc, Sr, Ti, V, W, and Zn were instrumentally determined in these samples with accuracy ranging from −18 to +21% among elements for which reference values were available.

Prompt gamma-ray neutron activation analysis by the absolute method

1991 ◽  
Vol 151 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Y. S. Khrbish ◽  
N. M. Spyrou
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Gamma Ray ◽  
Prompt Gamma ◽  
Absolute Method ◽  
The Absolute

scholarly journals Comparison of IUPAC k 0 values and neutron cross sections to determine a self-consistent set of data for neutron activation analysis

2011 ◽  
Vol 1 (1) ◽  
pp. 305-312
Author(s):  
R. B. Firestone ◽  
Zs. Révay
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Cross Sections ◽  
Gamma Ray ◽  
Transition Probabilities ◽  
Reference Database ◽  
Prompt Gamma ◽  
Self Consistent ◽  
Nuclear Constants

Abstract Independent databases of nuclear constants for Neutron Activation Analysis (NAA) have been independently maintained by the physics and chemistry communities for many year. They contain thermal neturon cross sections σ 0, standardization values k 0, and transition probabilities P γ . Chemistry databases tend to rely upon direct measurements of the nuclear constants k 0 and P γ which are often published in chemistry journals while the physics databases typically include evaluated σ 0 and P γ data from a variety of experiments published mainly in physics journals. The IAEA/LBNL Evaluated Gamma-ray Activation File (EGAF) also contains prompt and delayed γ-ray cross sections σ γ from Prompt Gamma-ray Activation Analysis (PGAA) measurements that can also be used to determine k 0 and σ 0 values. As a result several independent databases of fundamental constants for NAA have evolved containing slightly different and sometimes discrepant results. An IAEA CRP for a Reference Database for Neutron Activation Analysis was established to compare these databases and investigate the possibilitiy of producing a self-consistent set of σ 0, k 0, σ γ , and P γ values for NAA and other applications. Preliminary results of this IAEA CRP comparison are given in this paper.

Elemental analysis of medicinal plants from different sites by instrumental neutron activation analysis

2016 ◽  
Vol 5 (03) ◽  
pp. 4892 ◽  
Author(s):  
Ratna Raju M.* ◽  
Madhusudhana Rao P. V. ◽  
Seshi Reddy T. ◽  
Raju M. K. ◽  
Brahmaji Rao J. S. ◽  
...  
Keyword(s):  
Neutron Activation Analysis ◽  
Instrumental Neutron Activation Analysis ◽  
Activation Analysis ◽  
Medicinal Plants ◽  
Neutron Activation ◽  
Gamma Ray ◽  
Elemental Content ◽  
Soil Composition ◽  
Gamma Ray Spectrometer ◽  
Instrumental Neutron Activation

A study was undertaken to evaluate the inorganic elements for humans in two Indian medicinal plants leaves, namely Sphaeranthus indicus, and Cassia fistula by Instrumental Neutron Activation Analysis (INAA). INAA experiment was performed by using 20 kW KAMINI Reactor at Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam. The emitted gamma rays were measured using gamma ray spectrometer. The concentrations of Al, Br, Ca, Fe, K, La, Mg, Mn, Na, Sc, V and Zn were determined in the selected medicinal plants. The medicinal leaves are using in treatment of various important ailments. The elemental content in selected medicinal leaves is various proportions depending on the soil composition, location of plant specimen and the climate in which the plant grows.

scholarly journals TL, OSL and C-14 dating results of the sediments and bricks from mummified nuns' grave

2012 ◽  
Vol 84 (2) ◽  
pp. 237-244 ◽  
Author(s):  
Diego R.G. Tudela ◽  
Sonia H. Tatumi ◽  
Márcio Yee ◽  
Silvio L.M. Brito ◽  
José L. Morais ◽  
...  
Keyword(s):  
Eighteenth Century ◽  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Gamma Ray ◽  
The State ◽  
Osl Dating ◽  
Annual Dose ◽  
Dose Rates ◽  
Gamma Ray Spectroscopy

This paper presents the results of TL and OSL dating of soil and fragments of bricks from a grave, which was occupied by two mummified nuns, found at "Luz" Monastery, located in the state of São Paulo, Brazil. The TL and OSL ages were compared to C-14 dating ones obtained from bone collagens of the mummies. The majority of the ages is related to the eighteenth century. The gamma-ray spectroscopy was used to evaluate natural radioisotope concentrations in the samples, and by using these concentrations the annual dose rates, from 3.0 to 5.3 Gy/kyr, were obtained. Neutron activation analysis was performed and the radioisotope contents results are in agreement with those obtained by gamma-ray spectroscopy. The contents of U, Th and Ce elements were higher than those found in usual sediments.

Vanadium in human serum, as determined by neutron activation analysis.

1984 ◽  
Vol 30 (10) ◽  
pp. 1700-1703 ◽  
Author(s):  
M Simonoff ◽  
Y Llabador ◽  
A M Peers ◽  
G N Simonoff
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Human Serum ◽  
Healthy Subjects ◽  
Narrow Range ◽  
Physiological Role ◽  
Chemical Separation ◽  
National Bureau ◽  
Serum Samples

Abstract Vanadium concentrations have been measured in the serum of 23 healthy subjects by neutron activation analysis, with post-irradiation chemical separation. The values obtained fall in a fairly narrow range (260-1300 ng/L, mean 670 ng/L), which suggests a physiological role for this element. We checked the method by analysis of standard (U.S. National Bureau of Standards) water samples and serum samples supplemented with 48V, and we found excellent agreement with expected results in both cases. We consider the reported results for human serum to be more reliable than those obtained by atomic absorption spectroscopy.

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