NATURAL RADIONUCLIDES AND Cs-137 IN MOSS AND LICHEN IN EASTERN SERBIA

作者：Cuculovic Ana; Popovic Dragana^*; Cuculovic Rodoljub; Ajtic Jelena

来源：Nuclear Technology & Radiation Protection, 2012, 27(1): 44-51.

DOI：10.2298/NTRP1201044C

• moss
• lichen
• radionuclides
• Eastern Serbia

The paper presents the results of radionuclides determination in moss (Homolothecium sp., Hypnum Cupressiforme sp., and Brachythecium sp.) and lichen (Cladonia sp.) sampled in the region of Eastern Serbia during 1996-2010. The activities in moss are in the range of 100-500 Bq/kg d. w. for K-40, and 5-50 Bq/kg d. w. for Ra-226 and Th-232, while the "soil-to-moss" transfer factors are 0.45 for K-40, 3 for Ra-226, and 0.3 for Th-232. The spatial distribution of the Cs-137 activities is highly non-uniform; some values reach 500 Bq/kg d. w., with less than 10% of the samples, mainly the ones taken prior to 2000, with the activity above 1000 Bq/kg d. w. The variations in the content of natural radionuclides among the moss species are not significant. The frequency pattern of the activities of natural radionuclides in lichen is similar to the one in moss, but the activities in lichen are to some extent lower. The mean activity of Cs-137 in lichen is below 400 Bq/kg d. w. The mean activities of Be-7 in moss and lichen sampled in 2006 and 2008 are in the range of 41-122 Bq/kg d. w., with pronounced variations between the sampling sites.

• 出版日期2012-3