Direct gamma-X spectrometry measurement of in environmental samples using experimental self-absorption corrections

Bouisset, P.; Lefèvre, Odile; Cagnat, X.; Kerlau, G.; Ugron, A.; Calmet, D.

doi:10.1016/s0168-9002(99)00664-6

Cited by 31 publications

(19 citation statements)

References 19 publications

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“…Self-attenuation correction factors were integrated into these values. Only density correction factors for 40 K were used, to which a matrix correction factor was added in the case of 129 I [1]. Density corrections are generally applied in gamma metrology laboratories, which is not the case for matrix corrections as the elementary composition of a sample taken from the environment can vary greatly, even when the same species is used.…”

Section: Results -Discussionmentioning

confidence: 99%

“…• standard gamma spectrometry to quantify radionuclides in samples using N-type HPGe detectors with a relative efficiency above 50% [10], and • transmission in relation to the energy of a parallel flux of photons (collimator) with a planar detector in view of determining mass attenuation coefficients [1][2]. The gamma spectrometers were calibrated using Analytics or Cerca multi-elementary sources (water equivalent resin matrix, density = 1.15 g.cm -3 ).…”

Section: Quantification Of 129 I By Gamma Spectrometrymentioning

confidence: 99%

“…An attenuation correction factor at low energy was calculated using the mass attenuation coefficient of each seaweed species [1][2]. The coefficients for gamma-X rays of 129 I for Fucus serratus and Laminaria digitata are represented in table 2 and 3 respectively.…”

Section: Mass Attenuation Coefficients For Gamma-x Rays Of 129 Imentioning

confidence: 99%

“…These corrections must not only take into account the density but also the elementary composition of the matrix seeing that the photoelectrical process becomes the dominating interaction phenomenon under 100 keV. We recently developed a corrective method based on transmission measurements [1][2] to determine these self-attenuation correction factors in relation to standard calibration sources. Temporal variations in the self-attenuation coefficient are related to variations in the elementary composition of the matrix, including variations in iodine in the case of seaweed.…”

Section: Introductionmentioning

confidence: 99%

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¹²⁹I determination by direct gamma-X spectrometry and its application to concentration variations in two seaweed species

Barker¹,

Masson

Bouisset³

et al. 2005

Radioprotection

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Abstract. The quantification of radionuclides by direct gamma-X spectrometry with energy below 100 keV requires knowledge the elementary composition of the sample or the development of a device for determining the mass attenuation coefficients. This is especially true for 129 I which is characterised by a 29.8 keV X-ray and 39.6 keV gamma ray. Experimental equipment has been developed in order to obtain this mass attenuation coefficient as a function of energy. 129 I concentrations were measured in samples of seaweed (Fucus serratus and Laminaria digitata) collected monthly over a period of one year nearby La Hague reprocessing plant in France. This paper describes the measurement methodology used to determine 129 I concentrations and variations in the two seaweeds over a one-year period. Mean mass attenuation coefficients for 129 I energies were established in order to determine the self-attenuation corrective factor for both seaweed species, regardless of the sampling date.

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Section: Results -Discussionmentioning

confidence: 99%

Section: Quantification Of 129 I By Gamma Spectrometrymentioning

confidence: 99%

Section: Mass Attenuation Coefficients For Gamma-x Rays Of 129 Imentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

¹²⁹I determination by direct gamma-X spectrometry and its application to concentration variations in two seaweed species

Barker¹,

Masson

Bouisset³

et al. 2005

Radioprotection

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“…They are then packed in order from 17 to 60 mL. The measurements of 210 Pb were performed by the metrology laboratory of IRSN-Orsay under conditions described by Bouisset et al (1999). The analyses of 210 Po on seafood were performed at the IRSN-STEME laboratory (Le Vésinet, France) by alpha spectrometry after acid digestion of around 0.2 to 1.1 g of dried matter followed by deposition onto a stainless steel disc.…”

Section: Methodsmentioning

confidence: 99%

²¹⁰Pb and²¹⁰Po activities in French foodstuffs

Renaud¹,

Roussel-Debet²,

Pourcelot³

et al. 2015

Radioprotection

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-The data on 210 Pb and 210 Po activities in French foodstuffs acquired during the last 15 years are numerous enough to derive reference values which will be usable to assess the dose to the French population due to the intake of these two natural radionuclides. The means and ranges are close to those observed in various countries and are most often higher than the reference values proposed by UNSCEAR. Mussels and oysters exhibit the highest 210 Po activities of all kinds of foodstuffs, with a mean value of 27 Bq.kg −1 fresh weight , followed by crustaceans and small fish species (anchovies, mullets, sardines, etc.) with 210 Po activities in the order of 3 to 10 Bq.k −1 fresh weight; cephalopods and other fish species presenting activities around 1 to 3 Bq.kg −1 fresh, close to the UNSCEAR reference value. Below these highest 210 Po activities are those of 210 Po and 210 Pb in terrestrial kinds of foodstuffs, by decreasing order: meats (around 1 Bq.kg −1 fresh), cereals (0.4 Bq.kg −1 ), leafy vegetables (0.3 Bq.kg −1 ), other vegetables and fruits (0.1 Bq.kg −1 ), and milk (from 0.03 to 0.1 Bq.L −1 ).

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Efficiency Calculation of Gamma Detectors byMonteCarlo Methods

Sima

2012

Encyclopedia of Analytical Chemistry

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γ‐Ray spectrometry is a powerful nondestructive multielemental analysis technique. Its quantitative application requires efficiency calibration. Among the methods available for the computation of the efficiency calibration curve, Monte Carlo simulation is ever increasing in popularity. The need for Monte Carlo simulation is the consequence of the inability of experimental calibration to cope with the broader scope and measuring configurations (shape, volume, and matrices of the samples), with the enhanced coincidence‐summing nuclide specific effects (favored by the current tendency to use high‐efficiency detectors) and with the desired performance parameters (detection limit and uncertainty) met in present‐day applications of γ‐ray spectrometry. The availability of a variety of Monte Carlo packages that can be applied to efficiency computation, several of them user friendly indeed, enlarged the class of potential users of this method. While experimental calibration remains the preferred method in the case of point sources and specific volume sources, such as solutions, it is the flexibility of Monte Carlo calculation that can provide a comprehensive calibration of γ‐ray detectors for a broad range of applications. In this article, the principles of Monte Carlo method are introduced, the applications to detector simulation are presented, and the solutions of typical problems in the calibration of γ‐spectrometry systems are reviewed.

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Direct gamma-X spectrometry measurement of in environmental samples using experimental self-absorption corrections

Cited by 31 publications

References 19 publications

¹²⁹I determination by direct gamma-X spectrometry and its application to concentration variations in two seaweed species

¹²⁹I determination by direct gamma-X spectrometry and its application to concentration variations in two seaweed species

²¹⁰Pb and²¹⁰Po activities in French foodstuffs

Efficiency Calculation of Gamma Detectors byMonteCarlo Methods

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Direct gamma-X spectrometry measurement of in environmental samples using experimental self-absorption corrections

Cited by 31 publications

References 19 publications

129I determination by direct gamma-X spectrometry and its application to concentration variations in two seaweed species

129I determination by direct gamma-X spectrometry and its application to concentration variations in two seaweed species

210Pb and210Po activities in French foodstuffs

Efficiency Calculation of Gamma Detectors byMonteCarlo Methods

Contact Info

Product

Resources

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¹²⁹I determination by direct gamma-X spectrometry and its application to concentration variations in two seaweed species

¹²⁹I determination by direct gamma-X spectrometry and its application to concentration variations in two seaweed species

²¹⁰Pb and²¹⁰Po activities in French foodstuffs