SharePoint
Aide
IRSN, Institut de radioprotection et de sûreté nucléaire

Search our site :

ok

Contact us :

ok
En Fr

Enhancing Nuclear Safety


Research

Publications

Direct gamma-X spectrometry measurement of I-129 in environmental samples using experimental self-absorption corrections

Bouisset, P; Lefevre, O; Cagnat, X; Kerlau, G; Ugron, A; Calmet, D NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 437: (1) 114-127 NOV 11 1999

Document type > *Article de revue

Keywords > measurement of radioactivity traces, gamma spectrometry, iodine

Research Unit > IRSN/DEI/STEME/LMRE

Authors > BOUISSET Patrick

Publication Date > 01/01/1999

Summary

Direct gamma-X spectrometry is a suitable technique for quantifying low-level I-129 activity, down to a few becquerels per kilogram, in environmental samples. Direct gamma-X spectrometry is a non-destructive technique that is rapid, which can be used for measuring several radioisotopes (multielementary) and that is easy to implement. A description is given of an experimental method for determining the self-absorption correction in the low-energy range, below 25 keV, to quantify I-129 in different environmental matrices. The method is based on the measurement of the mass energy-attenuation coefficient mu(m)(E) of the sample and the standard used to calibrate the measuring system. The mu(m)(E) data are introduced in a simplified formulation of the correction factor that is validated for several container-detector sets commonly used in low-level activity environmental measurement. The method has also been tested on I-125, I-129 and Cs-137, using different energy transitions. For marine algae species with high iodine concentrations (>2 x 10(-3) as a fraction of mass), an original method of determining the I-129/I-total ratio as against the mu(m)(E) determination in the vicinity of the iodine K-absorption edge energy is described. (C) 1999 Elsevier Science B.V. All rights reserved.

Close

Send to a friend

The information you provide in this page are single use only and will not be saved.
* Required fields

Recipient's email:*  

Sign with your name:* 

Type your email address:*   

Add a message :

Do you want to receive a copy of this email?

Send

Cancel

Close

WP_IMPRIMER_TITLE

WP_IMPRIMER_MESSAGE

Back

Ok