I-129 and I-129/I-127 ratio determination in environmental biological samples by RNAA, AMS and direct gamma-X spectrometry measurements.
Frechou, C; Calmet, D; Bouisset, P; Piccot, D; Gaudry, A; Yiou, F; Raisbeck, G.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 249: (1) 133-138;
Different techniques are available for the measurement of I-129 or I-129/I-127 ratio. Due to the lack of international certified reference material for I-129, intercomparison exercises on the measurement of I-129 are very rare. This study presents two intercomparison exercises between three techniques: direct gamma -X spectrometry, radiochemical neutron activation analysis and accelarator mass spectrometry. A reference material was constituted with a Fucus scrratus collected on the french channel coast. A significative correlation between the results given by the three techniques was proven on this material and on a set of other Fucus serratus samples presenting different activity levels.