Issue |
Radioprotection
Volume 40, May 2005
ECORAD 2004
|
|
---|---|---|
Page(s) | S581 - S587 | |
DOI | https://doi.org/10.1051/radiopro:2005s1-085 | |
Published online | 17 June 2005 |
129I determination by direct gamma-X spectrometry and its application to concentration variations in two seaweed species
1
IRSN/DEI/STEME/Environmental Radioactivity Measurement Laboratory, Bât. 501, Bois des Rames, 91400 Orsay, France, e-mail: evelyne.barker@irsn.fr
2
IRSN/DEI/SECRE/Octeville-Cherbourg Radioecology Laboratory, Rue Max Pol Fouchet, BP. 10, 50130 Octeville, France
3
EDF, 6 quai Watier, 78401 Chatou Cedex, France
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 129I 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. 129I 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 129I concentrations and variations in the two seaweeds over a one-year period. Mean mass attenuation coefficients for 129I energies were established in order to determine the self-attenuation corrective factor for both seaweed species, regardless of the sampling date.
© EDP Sciences, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.