Radon tightness of different sample sealing methods for gamma spectrometric measurements of 226Ra

Mauring, Alexander; Gäfvert, Torbjørn

doi:10.1016/j.apradiso.2013.03.022

Cited by 44 publications

(26 citation statements)

References 11 publications

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“…All samples were measured in specific polypropylene sample container (cylinders 75.4 mm of diameter, 31 mm height) sealed to avoid 222 Rn loses. Each container was totally filled with the sample and the measurements were carried out after 21 days to ensure secular equilibrium between radionuclides and their progeny [9] , [10] , [11] , [12] . The samples were measured in duplicate, except in cases where a sufficient quantity of sample was not available.…”

Section: Methodsmentioning

confidence: 99%

Data on natural radionuclide's activity concentration of cement-based materials

et al. 2020

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Cement based materials may contain varying levels of radionuclides, mainly 226 Ra (from the 238 U series), 232 Th and 40 K, which are used to determine the Activity Concentration Index ("ACI"). According to the European directive Euratom 2013/59 in these materials, the “ACI” must be < 1 to be suitable for their use in construction. In this paper, data on the activity concentration of natural radionuclides in cement-based materials (i.e. cements, additions, pigments and aggregates) as well as their chemical composition are presented. Radioactivity measurements have been determined by using gamma spectroscopy the chemical compositions have been determined by X-Ray Fluorescence. Data for cements measured shown that white cements present a lower concentration of activity than conventional CEM I. In addition, the CAC (Calcium aluminate cements) present high activity concentration in the 232 Th series. Regarding additions, FA (Fly Ash) are those that present the highest concentration of activity in the 238 U and 232 Th series, while olive biomass ashes are those supplementary cementitious materials that show the highest concentration of activity for 40 K. Some pigments used in mortar and concrete technology were also characterized. Granitic and volcanic rocks, potentially used as aggregates present much higher activity concentration than the siliceous aggregate.

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Section: Methodsmentioning

confidence: 99%

Data on natural radionuclide's activity concentration of cement-based materials

et al. 2020

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“…Each standard sample is accurately sealed using vinyl tape and then left undisturbed for at least 4 weeks in order to establish radioactive equilibrium between 226 Ra and 222 Rn prior to be measured. In the case of materials characterized by high radon exhalation, the sealing is very important in order to reduce the 222 Rn loss [11,12]. The sealing effectiveness and consequently the 222 Rn growth within the container were successfully checked, as shown in Fig.…”

Section: Absolute Efficiency Determination and Uncertainty Analysismentioning

confidence: 99%

Calibration of HPGe detectors using certified reference materials of natural origin

Xhixha

Albéri

Baldoncini

et al. 2015

J Radioanal Nucl Chem

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The feasibility of using certified reference\ud materials for the full energy efficiency calibration of p-type\ud coaxial high-purity germanium detectors for the determination\ud of radioactivity in environmental samples is discussed.\ud The main sources of uncertainty are studied and the\ud contributions to the total uncertainty budget for the most\ud intense gamma lines are presented. The correction factors\ud due to self-absorption and true coincidence summing\ud effects are discussed in detail. The calibration procedure is\ud validated for natural and artificial radionuclide determination\ud in different matrices through an internal cross-validation\ud and through the participation in a world-wide open\ud proficiency test

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“…The values of the activity of 226 Ra, determined from its daughter decay products, and the activity of 226 Ra, experimentally determined from its own gamma radiation (186.21 keV), coincided within at least 90%. Both methods of the registration of the 226 Ra radionuclide (by its own gamma radiation and by the gamma radiation of its decay products) have their own advantages and disadvantages [25].…”

Section: Gamma Spectrometry Measurementsmentioning

confidence: 99%

Radon over Kimberlite Pipes: Estimation of the Emanation Properties of Rocks (Lomonosov Diamond Deposit, NW Russia)

Yakovlev

Puchkov

2021

Applied Sciences

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In this paper, using the example of the Lomonosov diamond deposit, experimental studies of rocks were carried out to assess the main radiation and physical factors affecting the formation of the radon field over the kimberlite pipes of the Arkhangelsk diamondiferous province. For various types of rocks, represented by vent kimberlites, tuffaceous-sedimentary rocks of the crater and enclosing and overlying sediments, the following were studied: porosity, density, activity of radium-226, activity of radon in a free state, level of radon production, and emanation coefficient. The research results showed that the greatest amount of radon in a free state is produced by rocks of the near-pipe space, represented by the enclosing Vendian V2 deposits and characterized by high values of the emanation coefficient, radium activity, radon production level and porosity. This fact is associated with the structural and geological features of the near-pipe space, which was exposed to the impact of kimberlite magma on the host rocks. The lowest values of these parameters are characteristic of the kimberlites of the vent facies, which limits the formation of free radon in the body of the pipe. The results of the experimental studies create prospects for the development of emanation methods for searching for kimberlite pipes in the conditions of the Arkhangelsk diamondiferous province.

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Radon tightness of different sample sealing methods for gamma spectrometric measurements of 226Ra

Cited by 44 publications

References 11 publications

Data on natural radionuclide's activity concentration of cement-based materials

Data on natural radionuclide's activity concentration of cement-based materials

Calibration of HPGe detectors using certified reference materials of natural origin

Radon over Kimberlite Pipes: Estimation of the Emanation Properties of Rocks (Lomonosov Diamond Deposit, NW Russia)

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