p>137p>Cs, p>40p>K, p>90p>Sr, p>238, 239+240p>Pu, p>241p>Am and p>243+244p>Cm in forest litter and their transfer to some species of insects and plants in bor

详细信息    查看全文

• 作者：Mietelski ; J. W. ; Szwa&lstrok ; ko ; P. ; Tomankiewicz ; E. ; Gaca ; P. ; Ma&lstrok ; ek ; S. ; Barszcz ; J. ; Grabowska ; S.
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2004
• 出版时间：2004
• 年：2004
• 卷：262
• 期：3
• 页码：645-660
• 全文大小：1.75 MB

文摘

Results for p>137p>Cs, p>40p>K, p>90p>Sr, p>238,239+240p>Pu, p>241p>Am and p>243+244p>Cm measurements in plant, insects and forest litter samples collected at three sites in Poland are presented. New results are compared with some existing data for locations examined during previous studies. Insect samples were introduced now for the first time. Relatively high activities of p>90p>Sr were noticed for spruce bark beetle (Ips typographus) and those for p>137p>Cs, plutonium and p>241p>Am for forest dung beetle (Anoplotrupes stercorosus). Faster than caused by physical decay decrease of radiocesium activity was noticed for the majority of plant and litter samples. The results for p>239+240p>Pu for litter were similar to previous results, but the activities of p>238p>Pu were smaller. The activity ratio between p>241p>Am and p>239+240p>Pu was found lower than expected for known proportions between global and Chernobyl fallout. Thus a kind of dynamic behavior of Pu and Am in the forest ecosystem is concluded. Transfer factors and aggregation coefficients were estimated and discussed for both plants and insects as well as between insects and the part of plants (or litter) they feed on. Many of them were never presented before.p>