IAEA-447: A new certified reference material for environmental radioactivity measurements

Shakhashiro, A.; Tarján, S.; Ceccatelli, A.; Kis-Benedek, G.; Betti, Mirko

doi:10.1016/j.apradiso.2012.03.024

Cited by 35 publications

(13 citation statements)

References 8 publications

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“…The Ra-226 activity concentration was obtained via the radon progenies Pb-214 (295 keV) and Bi-214 (609 keV), the Th-232 content was determined from Ac-228 (911 keV) and Tl-208 (2614 keV) and the K-40 content was measured from the 1460 keV gamma line (Shakhashiroa et al, 2012) by an ORTEC GMX40-76 HPGe detector. The sample measuring time was 80 000 s. The system was calibrated with IAEA-326 soil reference material.…”

Section: Gamma Spectrometrymentioning

confidence: 99%

Radiological characterization of clay mixed red mud in particular as regards its leaching features

Hegedűs

Sas

Tóth-Bodrogi

et al. 2016

Journal of Environmental Radioactivity

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Section: Gamma Spectrometrymentioning

confidence: 99%

Radiological characterization of clay mixed red mud in particular as regards its leaching features

Hegedűs

Sas

Tóth-Bodrogi

et al. 2016

Journal of Environmental Radioactivity

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“…The milled material was sieved to obtain a maximum particle size distribution of 150 μm. The material density was measured in 5 test portions and found to be ± − 1.03 0.05 g cm 3 [14].…”

Section: Iaea447 Standardmentioning

confidence: 99%

“…The certified values used to evaluate the activities of radionuclides were established on the basis of results reported by the IAEA Terrestrial Environment Laboratory in Seibersdorf, Austria [14].…”

Section: Iaea447 Standardmentioning

confidence: 99%

Well GeHP detector calibration for environmental measurements using reference materials

Tedjani

Mavon

Belafrites

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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International audienceA well-type detector installed in the Modane underground Laboratory (LSM) can combine both low background and high detection efficiency and it is well suited for the analysis of small amounts of environmental samples. Reference materials such as IAEA-447 (moss-soil), IAEA-RG-Th1 and IAEA-RG-U1 were used for the detector calibration, owing to a chemical composition close to those of the environmental samples. Nevertheless , the matrix effects and the true coincidence summing effects must be corrected from the full energy peak efficiency (FEPE). The FEPE was performed for a wide range of energy by a semi-empirical method using Monte Carlo simulation (MCNP6), intended for environmental measurements such as lake sediments dating. In the well geometry, the true coincidence summing effects could be very important and correction factors have been computed in three different ways

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“…IAEA RGU-1, RGTh-1 and RGK-1 are reference materials meant for the experimental calibration of gamma-ray spectrometers for Potassium, Uranium and Thorium [22]. IAEA 447 [24][25][26], IAEA 448 [26][27][28], IAEA 434 [26,29,30] and IAEA 326 [26,31] are environmental samples (moss-soil, contaminated soil from an oil field, Phosphogypsum and soil sample respectively) with certified activities for several radionuclides of interest for environmental radioactivity laboratories. With regard to the CANMET DH-1a [32,33] is an ore with a considerable concentration of both uranium and thorium (0.2629% U and 0.091% Th).…”

Section: Reference Materials and Beakersmentioning

confidence: 99%

Automatic modeling using PENELOPE of two HPGe detectors used for measurement of environmental samples byγ-spectrometry from a few sets of experimental efficiencies

Guerra

Rubiano

Winter

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tThe aim of this paper is to characterize two HPGe gamma-ray detectors used in two different laboratories for environmental radioactivity measurements, so as to perform efficiency calibrations by means of Monte Carlo Simulation. To achieve such an aim, methodologies developed in previous papers have been applied, based on the automatic optimization of the model of detector, so that the differences between computational and reference FEPEs are minimized. In this work, such reference FEPEs have been obtained experimentally from several measurements of the IAEA RGU-1 reference material for specific source-detector arrangements. The models of both detectors built through these methodologies have been validated by comparing with experimental results for several reference materials and different measurement geometries, showing deviations below 10% in most cases. (J.G. Guerra). work [16,17], in which automatic computational methodologies for the characterization of HPGe detectors have been developed.In the first paper [16], a simple methodology of characterization is proposed, consisting in an implementation of a mono-objective optimization evolutionary algorithm, called Differential Evolution or DE [18], together with the Monte Carlo Simulation code PENE-LOPE [19], so that a computational model of the detector would be built automatically, with the only requirements of an accurate set of reference FEPEs for a specific sample-detector arrangement and material of the sample, but restricted to those beakers with a diameter lower than the crystal diameter of the detector. In the second [17], the methodology proposed in the first work was upgraded, eliminating such restriction by both improving the detector model and implementing a multi-objective Differential Evolution algorithm or DEMO [20] instead of its monoobjective precursor DE. In both cases, the methodologies proved to obtain successfully a detector model which generated FEPEs equivalent to the ones taken as reference, which were calculated, for a given

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IAEA-447: A new certified reference material for environmental radioactivity measurements

Cited by 35 publications

References 8 publications

Radiological characterization of clay mixed red mud in particular as regards its leaching features

Radiological characterization of clay mixed red mud in particular as regards its leaching features

Well GeHP detector calibration for environmental measurements using reference materials

Automatic modeling using PENELOPE of two HPGe detectors used for measurement of environmental samples byγ-spectrometry from a few sets of experimental efficiencies

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