Plutonium and other alpha-emitters in bones of wild, herbivorous animals from north-eastern Poland

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• 作者：Mietelski ; J.W. ; Gaca ; P. ; Jasinska ; M.
• 关键词：Environmental radioactivity ; Animal bones ; Actinides ; Chernobyl fallout
• 刊名：Applied Radiation and Isotopes
• 出版年：2000
• 期刊代码：6_09698043
• 类别：ce
• 出版时间：July 15, 2000
• 卷：53
• 期：1-2
• 页码：251-257
• 文件大小：280 K

摘要

The results of the investigation of ^239+240Pu, ²⁴¹Am and thorium isotope activity concentrations in bones of wild herbivorous animals (deer, roe-deer, boars, elks) from north-eastern Poland are presented. The area on which the animals were living had relatively high Chernobyl plutonium fallout. Possible traces of plutonium were seen only in four samples, but only for one it was it 3σ above background, at 6.2 ± 2.4 mBq/kg (ash). The ²⁴¹Am activity concentration was below the detection limits in all samples. The maximum ²²⁸Th concentration in the samples was 7.81 ± 0.44 Bq/kg (ash), calculated under the assumption of 100%thorium recovery. This isotope seems to originate in bones not from direct incorporation but from the decay of ²²⁸Ra. Large variations in activity concentration wose observed, as well as some differences between boars and the chewing animals.