Authors:
S. Ribeiro Guevara Universidad Nacional de Cuyo Laboratorio de Análisis por Activación Neutrónica, Centro Atómico Bariloche, Instituto Balseiro, Comisión Nacional de Energía Atómica Argentina

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A. Rizzo Laboratorio de Análisis por Activación Neutrónica, CONICET Argentina

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R. Sánchez Universidad Nacional de Cuyo Laboratorio de Análisis por Activación Neutrónica, Centro Atómico Bariloche, Instituto Balseiro, Comisión Nacional de Energía Atómica Argentina

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M. Arribére Universidad Nacional de Cuyo Laboratorio de Análisis por Activación Neutrónica, Centro Atómico Bariloche, Instituto Balseiro, Comisión Nacional de Energía Atómica Argentina

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Abstract  

Unsupported 210Pb fluxes were determined from sediment core inventories in lakes located in Northern Patagonia, Argentina. Total 210Pb, 226Ra, associated with supported 210Pb, and 137Cs specific activity profiles were measured by gamma-ray spectrometry. Unsupported 210Pb fluxes showed very low values when compared to other regions, with a 12 fold variation, ranging from 4 to 48 Bq m–2.y–1. The linear correlation observed between the 210Pb fluxes and137Cs cumulative fluxes in sediment cores sampled from water bodies within a zone with similar precipitation demonstrated that both radioisotopes behave in the same manner in these systems concerning the processes occurred from fallout to sediment deposition, and that there are no appreciable local or regional sources of unsupported 210Pb. Positive correlation of 210Pb fluxes with organic matter contents of the uppermost sediment core layers was also observed.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)