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Crustaceous lichens sensitive monitor of caesium-137 radiation level in terrestrial environment
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<正> The activity of caesium-137(Bq/kg)in the crustaceous lichens and othersamples was determined to prove the feasibility that crustaceous lichens work as a sen-sitive biology monitor to record the caesium-137(Bq/kg)radiation levels of terrestri-al environment.The measurements were performed with GEM series HPGe(high-pu-rity Germanium)coaxial detector system(ADCAM-100)made by EC & GORTECCompany in USA.It was found that the activity of caesium-137(Bq/kg)in the cru-staceous lichens was one order of magnitude higher than that found in surface soil,and was over three orders of magnitude higher than those found in the familiar biologi-cal samples.These results proved that crustaceous lichens may be one of the mostsensitive biolog-ical monitors about the remote transmission and environmental radia-tion levels of caesium-137. 相似文献
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The~(137)Cs activity and its geographical significance in terrestrial ecosystem of Great Wall Station, Antarctica
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The radioactive isotope 137 Cs is one of the important tracers for studying the physical processes and the human impacts on the environment. Based on the investigation results of the terrestrial ecosystem of Great Wall Station, Antarctica, it was shown that there are some artificial radioactive elements 137 Cs in Antarctic terrestrial ecosystem. The sequence of 137 Cs specific activities is as follows: crustaceous lichen>fruticose lichen>surfacemoss>surface soil, and the crustaceous lichen is one of the most sensitive ways in monitoring the impact of the longterm diffusion of 137 Cs on the environment. 相似文献
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The activity of caesium-137 (Bq/kg) in the crustaceous lichens and other samples was determined to prove the feasibility that crustaceous lichens work as a sensitive biology monitor to record the caesium-137 (Bq/kg) radiation levels of terrestrial environment. The measurements were performed with GEM series HPGe ( high-purity Germanium) coaxial detector system (ADCAM -100 ) made by EC & GORTEC Company in USA. It was found that the activity of caesium-137 (Bq/kg) in the crustaceous lichens was one order of magnitude higher than that found in surface soil, and was over throe orders of magnitude higher than those found in the familiar biological samples. These results proved that crustaceous lichens may be one of the most sensitive biological monitors about the remote transmission and environmental radiation levels of caesium-137. 相似文献
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