Irradiation and measurement devices and methods development for LSNAA applications at the TRIGA-ACPR core

Roth, Csaba; Barbos, D.; Gugiu, Daniela; Datcu, A.; Dobrea, D.; Preda, Marin; Gligor, Mihai; Mweetwa, Madinka Bright

doi:10.1007/s10967-011-1231-7

Cited by 2 publications

(2 citation statements)

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“…Masses up to tens of grams may be irradiated using existing pneumatic transfer systems. For the analysis of larger objects (up to the (multi) kilogram range) facilities have been developed in the thermal columns of the reactor [14,34] (Figure 2), in its pool [35], or in external neutron beams [36,37], and dedicated neutron beams have been used for large-sample PGAA [38,39]. An overview of some operational large-sample NAA facilities for research reactors is given in Table 1.…”

Section: Methods and Conceptsmentioning

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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Section: Methods and Conceptsmentioning

confidence: 99%

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

Bode¹

2021

Minerals

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“…LSNAA technique has been successfully applied for the analysis of an intact ceramic vase [9], entire potsherds of archaeological interest [13,14], ancient Chinese porcelain ware [15], pottery pieces from Neolithic settlements in Romania [16] as well as of ancient pottery samples from Buddhist sites in India [17]. Moreover, the prompt gammaray neutron activation technique has been applied for analysis of large and non-standard geometry archaeological samples [18].…”

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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Irradiation and measurement devices and methods development for LSNAA applications at the TRIGA-ACPR core

Cited by 2 publications

References 1 publication

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

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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