Neutron self-shielding correction in application of k(0)-NAA standardization method to determine Mn content in manganese ores
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Date
2020-04-15
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Elsevier
Abstract
In this study, it is aimed to investigate neutron self-shielding effect in application of k(0)-NAA standardization method to determine Mn contents in manganese ores. Because the neutron self-shielding correction factors are significant factors in application of k(0)-NAA method for large samples. To estimate these, several Mn-ore samples and Au monitor were irradiated separately in a 37 GBq Am-241-Be neutron source irradiation unit and then they were measured by using a 78.5% relative efficient HPGe detector. In this study, the sigmoid function approaches for calculation of G(th) and G(e) factors were applied for the right cylinder sample geometry at known elemental compositions in samples, determined by EDXRF technique with a 25 mm(2) Silicon Drift Detector (SDD). The present results indicate that k(0)-NAA method is applicable successfully to determine Mn contents in Mn-ore samples providing that G(th) and G(e) factors are estimated accurately even if a low-flux isotopic neutron source is used.
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Keywords
Manganese ore, K(0)-NAA standardization method, Neutron self-shielding effect, Am-Be isotopic neutron source, Activation analysis, Universal curve, Samples, Accuracy, NAA, Energy dispersive spectroscopy, Germanium, Germanium compounds, Neutron sources, Neutrons, Ores, Shielding, Standardization, Correction factors, Elemental compositions, HPGe detectors, Isotopic neutron sources, Sample geometry, Self shielding effect, Sigmoid function, Silicon drift detector, Phosphorus compounds, Instruments & instrumentation, Nuclear science & technology, Physics
Citation
Akkaya, G. vd. (2020). "Neutron self-shielding correction in application of k(0)-NAA standardization method to determine Mn content in manganese ores". Nuclear Instruments & Methods in Physics Research Section B-beam Interactions with Materials and Atoms, 475, 1-7.