Nuclear and Technological Institute, E.N. 10, 2686-953 Sacavém, Portugal.
J Environ Radioact. 2012 Dec;114:152-6. doi: 10.1016/j.jenvrad.2012.03.005. Epub 2012 Apr 13.
The radioactivity released from the Fukushima Dai-ichi nuclear accident was transported around the globe by atmospheric processes. Several artificial radionuclides were detected and measured in aerosols and atmospheric surface depositions in the Lisbon area during late March and early April 2011. The highest concentrations measured in aerosols were those of particulate (131)I, 1.39 ± 0.08 mBq m(-3). Cesium-134, (137)Cs and (132)Te were also determined but at lower concentrations. The total atmospheric depositions on the ground were higher on the first week of April with values for (131)I, (134)Cs, and (137)Cs of 0.92 ± 0.11, 0.59 ± 0.06, and 0.62 ± 0.12 Bq m(-2), respectively. The four artificial radionuclides measurable, (131)I, (132)Te (134)Cs, and (137)Cs, caused little radiation exposure to the members of the public, that was five orders of magnitude lower than the ionizing radiation effective dose limits for members of the public for one year (1 mSv y(-1)).
福岛第一核电站核事故释放的放射性物质通过大气过程在全球范围内迁移。2011 年 3 月底至 4 月初，在里斯本地区的气溶胶和大气表面沉积物中检测到并测量了几种人工放射性核素。气溶胶中测量到的最高浓度是放射性碘-131，为 1.39 ± 0.08 mBq m(-3)。还测定了铯-134、(137)Cs 和(132)Te，但浓度较低。4 月的第一周，地面上的总大气沉积量较高，放射性碘-131、铯-134 和铯-137 的值分别为 0.92 ± 0.11、0.59 ± 0.06 和 0.62 ± 0.12 Bq m(-2)。可测量的四种人工放射性核素（放射性碘-131、(132)Te、(134)Cs 和(137)Cs）对公众造成的辐射暴露很小，比公众一年的电离辐射有效剂量限值（1 mSv y(-1)）低五个数量级。
