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Alpha-spectrometry measurement of Am and Cm at trace levels in environmental samples using extraction chromatography


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Goutelard, F.; Morello, M.; Calmet, D. Journal of Alloys and Compounds 271-273 (1998) 25-30

Type de document > *Article de revue

Mots clés > métrologie des traces de radioactivité, américium, curium, séparation radiochimique, spectrométrie alpha

Unité de recherche > IRSN/DEI/STEME/LMRE

Auteurs > MORELLO Marcel

Date de publication > 01/01/1998

Résumé

Various anthropogenic sources contribute to the presence of americium and curium isotopes in environmental samples. Incomplete radiochemical separations led to electrodeposited sources containing stable element impurities increasing auto-absorption effects. Other radioactive elements, such as 227Ac and its daughters, interfered with 241Am and 243,244Cm emissions. These impurities are now completely eliminated using a Tru-Spec trademark column. Very low levels of 241Am and 243,244Cm in environmental samples (i.e. algae, mussels, sediment, etc.) from the Channel and the Rhone river, including its estuary, were investigated using a routine radiochemical process and measurement at levels as low as achievable with state of the art measuring technology.