Neutron activation analysis of multiple large geological samples by in-pool irradiation using a SLOWPOKE-2 reactor

Beeley, Philip; Garrett, Robert G.

doi:10.1007/bf02035478

Cited by 12 publications

(5 citation statements)

References 6 publications

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“…These factors depend on the irradiation facility, the gamma ray detection system employed and the sample characteristics. Several calibration techniques have been proposed such as the comparative method, 16 the internal standard method 17 and theoretical modeling of the irradiation and measurement processes. 6 In this work, Monte Carlo simulation of the irradiation and counting facilities using the MCNP code was applied.…”

Section: General Discussion and Conclusionmentioning

confidence: 99%

Large Sample Neutron Activation Analysis: A Challenge in Cultural Heritage Studies

Stamatelatos

Tzika

2007

Annali di Chimica

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Large sample neutron activation analysis compliments and significantly extends the analytical tools available for cultural heritage and authentication studies providing unique applications of non-destructive, multi-element analysis of materials that are too precious to damage for sampling purposes, representative sampling of heterogeneous materials or even analysis of whole objects. In this work, correction factors for neutron self-shielding, gamma-ray attenuation and volume distribution of the activity in large volume samples composed of iron and ceramic material were derived. Moreover, the effect of inhomogeneity on the accuracy of the technique was examined.

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Section: General Discussion and Conclusionmentioning

confidence: 99%

Large Sample Neutron Activation Analysis: A Challenge in Cultural Heritage Studies

Stamatelatos

Tzika

2007

Annali di Chimica

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“…Analyses of replicate test portions with masses of 50 g, grinded to 1-3 mm particles, clearly showed that even 300 g test portions were needed to reach the required variation of the between-test portion [51]. In the framework of metallic mineral survey projects, 10-15 g samples had to be analyzed to circumvent tedious homogenization procedures [52]. In view of a study on metal recovery and accounting, large-sample NAA was used for the quantification of Au and Ag in 50-100 g dross samples refined at the India Government Mint [53].…”

Section: Direct Analysis Of Materials For Which Homogenization Is Inconvenient Difficult or Close To Impossible And/or Too Expensive Due mentioning

confidence: 99%

Kilogram Sample Analysis by Nuclear Analytical Techniques: Complementary Opportunities for the Mineral and Geosciences

Bode¹

2021

Minerals

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Sample-size reduction including homogenization is often required to obtain a test portion for element compositional analysis. Analyses of replicate test portions may provide insight into the sampling constant, and often much larger quantities are needed to limit the contribution of sampling error. In addition, it cannot be demonstrated that the finally obtained test portion is truly representative of the originally collected material. Nuclear analytical techniques such as neutron and photon activation analysis and (neutron-induced) prompt gamma activation analyses can now be used to study and overcome these analytical problems. These techniques are capable of obtaining multi-element measurements from irregularly shaped objects with masses ranging from multiple grams to multiple kilograms. Prompt gamma analysis can be combined with neutron tomography, resulting in position-sensitive information. The analysis of large samples provides unprecedented complementary opportunities for the mineral and geosciences. It enables the experimental assessment of the representativeness of test portions of the originally collected material, as well as the analysis of samples that are not allowed to be sub-sampled or dissolved, the analysis of materials that are difficult to be homogenized at large, and studies on the location of inhomogeneities. Examples of such applications of large-sample analyses are described herein.

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“…Analysis of the acquired gamma spectra allows for the evaluation of the elemental composition of the sample. Absolute, comparative, k 0 and internal mono-standard based calibration techniques for LSNAA have been presented [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Large sample neutron activation analysis of irregular-shaped pottery artifacts

Vasilopoulou

Stamatelatos

Montoya³

et al. 2014

J Radioanal Nucl Chem

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The large sample neutron activation analysis (LSNAA) method developed at NCSR ''Demokritos'' for large and irregular-shaped objects was applied for the analysis of a Peruvian pottery artifact with the shape of an animal. The correction factors required for neutron selfshielding and gamma-ray self-attenuation within the sample material were derived through Monte Carlo simulations using the MCNP code, based on an accurate model obtained by computerized tomography X-ray scanning. The LSNAA results were compared with those from conventional instrumental neutron activation analysis (INAA) and a very good agreement was observed.

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Neutron activation analysis of multiple large geological samples by in-pool irradiation using a SLOWPOKE-2 reactor

Cited by 12 publications

References 6 publications

Large Sample Neutron Activation Analysis: A Challenge in Cultural Heritage Studies

Large Sample Neutron Activation Analysis: A Challenge in Cultural Heritage Studies

Kilogram Sample Analysis by Nuclear Analytical Techniques: Complementary Opportunities for the Mineral and Geosciences

Large sample neutron activation analysis of irregular-shaped pottery artifacts

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