Laboratory of Radiochemistry, Department of Chemistry, P.O. Box 55, 00014 University of Helsinki, Finland.
J Environ Radioact. 2012 Nov;113:163-70. doi: 10.1016/j.jenvrad.2012.06.005. Epub 2012 Jul 7.
The (240)Pu/(239)Pu mass ratio was determined with SF-ICP-MS in lichen, peat, grass, air filter, and hot particle samples obtained in Finland. The main part of the air filters were sampled in northern Finland in 1963, whereas all the other samples were collected in southern and central Finland immediately after the Chernobyl accident in 1986. The (240)Pu/(239)Pu mass ratio varied between 0.13 ± 0.01 and 0.53 ± 0.03 in the environmental samples analyzed. The values for the (240)Pu/(239)Pu ratio confirm previous estimations, based on the (238)Pu/(239+240)Pu alpha activity ratio in the same samples, that global fallout from nuclear weapons testing and deposition from the Chernobyl accident have been the main Pu contamination sources in the environment in Finland.
在芬兰获得的地衣、泥炭、草、空气过滤器和热颗粒样本中，使用 SF-ICP-MS 确定了（240）Pu/（239）Pu 质量比。1963 年在芬兰北部采集了空气过滤器的主要部分，而其他所有样本均于 1986 年在切尔诺贝利事故后立即在芬兰南部和中部采集。在所分析的环境样本中，（240）Pu/（239）Pu 质量比在 0.13±0.01 至 0.53±0.03 之间变化。（240）Pu/（239）Pu 比值的这些值证实了之前的估计，即基于同一样本中（238）Pu/（239+240）Puα 活度比，来自核武器试验的全球沉降物和切尔诺贝利事故的沉积是芬兰环境中 Pu 污染的主要来源。
