University Novi Sad, Trg Dositeja Obradovica, Novi Sad, Serbia.
J Environ Radioact. 2013 Mar;117:45-8. doi: 10.1016/j.jenvrad.2011.08.009. Epub 2011 Aug 30.
Terrestrial mosses are a promising medium for investigation and monitoring of airborne radionuclide depositions due to their widespread occurrence, ease of sampling, and the possibility of high-resolution gamma spectrometry measurements without preparatory chemical treatment of samples. The overall objective of the present study was to compare (7)Be, (210)Pb and (137)Cs activity concentrations (in Bq/kg) in moss samples collected at two different climate zones: the south of Thailand (7 °N) and in Serbia (∼45 °N) in order to examine deposition of airborne radionuclide in these distant areas. Significant difference of the (210)Pb content (almost a factor of 2) in mosses was observed. The mean value of (7)Be activity in samples from Serbia was almost 40% higher than activity of those collected in Thailand. Level of (137)Cs in Thailand mosses was below the detection limit. It was shown that air transport of water droplets in the area of waterfalls and strong turbulence can deposit U and Th daughter nuclei.
陆地苔藓由于其广泛的分布、易于采样以及无需对样品进行预备化学处理即可进行高分辨率伽马能谱测量的可能性，是研究和监测空气放射性核素沉降的一种很有前途的介质。本研究的总体目标是比较在两个不同气候区（泰国南部（7°N）和塞尔维亚（约 45°N））采集的苔藓样本中的 (7)Be、(210)Pb 和 (137)Cs 活度浓度（Bq/kg），以研究这些遥远地区空气中放射性核素的沉降情况。观察到苔藓中 (210)Pb 含量（几乎相差 2 倍）存在显著差异。来自塞尔维亚的样本中的 (7)Be 活度平均值比泰国采集的样本高出近 40%。泰国苔藓中的 (137)Cs 水平低于检测限。研究表明，在瀑布和强紊流区，水滴的空气传输可以沉积 U 和 Th 子核。
