Procedures to define Pu isotopic ratios characterizing a contaminated area in Palomares (Spain) |
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Authors: | C. Gascó M. P. Antón A. Espinosa A. Aragón A. Alvárez N. Navarro E. García-Toraño |
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Affiliation: | (1) Instituto de Medio Ambiente, CIEMAT, Avda. de la Complutense 22, 28040 Madrid, Spain;(2) Servicio de Protección Radiológica, CIEMAT, Avda. de la Complutense 22, 28040 Madrid, Spain;(3) Dirección de Tecnología, CIEMAT, Avda. de la Complutense 22, 28040 Madrid, Spain |
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Abstract: | Plutonium isotopic ratios have been calculated in soils contaminated by the Palomares accident which occurred in 1966 (Almería, Southeastem Spain). Contrasted techniques have been used to determine the radionuclide activities:238Pu and238+240Pu were analysed by -spectrometry prior purification on anion-exchange resins, the ratio239Pu/240Pu was estimated by -spectra deconvolution and241Pu was directly measured by liquid scintillation counting and indirectly through quantification of in-grown241Am from aged plutonium discs. The mean activity ratios238Pu/239Pu,239Pu/240Pu,241Pu/239Pu, backdated to 1966, were 0.027±0.002 (1), 4.5±0.2 (1) and 8.2±0.8 (1), respectively, characterizing the accident of Palomares as the source term of the measured plutonium. |
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