| 中国几个地区土壤中239,240Pu、241Am和137Cs等放射性核素的测定 |
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| 引用本文： | 沙连茂,山本政儀,小村和久,上野馨.中国几个地区土壤中239,240Pu、241Am和137Cs等放射性核素的测定[J].环境科学,1991(6):58-63. |
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| 作者姓名： | 沙连茂 山本政儀 小村和久 上野馨 |
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| 作者单位： | 中国辐射防护研究院
(沙连茂)，日本金泽大学低水平放射性实验室
(山本政儀，小村和久)，日本金泽大学低水平放射性实验室(上野馨) |
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| 摘 要： | 分别从北京、太原、石家庄和济南地区采集了深度为0-5和5-20cm的土壤样品,进行了~(239,240)Pu、~(241)Am、~(137)Cs、~(40)K以及天然铀、钍系放射性核素的测定.估计了样品中放射性核素的水平和分布.结果表明,~(239,240)Pu、~(241)Am和~(137)Cs 的平均累积沉降量分别为24+13、10±5和1230±700MBq/km~2.~(239,240)Pu/~(137)Cs活度比为0.016—0.026(平均值0.020±0.004),~(214)Am/~(239,240)Pu活度比为0.35—0.49(平均值0.43±0.05).还讨论了这些核素与土壤中“过剩”~(210)Pb之间的关系.
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| 关 键 词： | 环境监测 ~(239 240)Pu ~(241)Am ~(137)Cs 土壤 |
Plutonium-239, 240, Americium-241 and Ce-eium-137 in Soils from Some Areas in China |
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| M. Yamamoto,K. Komur,K. Ueno.Plutonium-239, 240, Americium-241 and Ce-eium-137 in Soils from Some Areas in China[J].Chinese Journal of Environmental Science,1991(6):58-63. |
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| Authors: | M Yamamoto K Komur K Ueno |
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| Institution: | China Institute for Radiation Protection, Taiyuan, China;Low Level Radioactivity Laboratory Kanazawa University, Japan;Low Level Radioactivity Laboratory Kanazawa University, Japan;Low Level Radioactivity Laboratory Kanazawa University, Japan |
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| Abstract: | The surface soil samples with a set of 0-5cm and 5-20 cm depth were collected from Beijing,Taiyuan, Shijiazhuang, and Jinan of China in early 1990. The samples were analyzed for 239,240Pu, 241Am and 137Cs. including naturally occurring radionuclides, to estimate their present levels and distributions. From these results, the average accumulated depositions were estimated roughly to be 24±13MBq/km2 for 239,240Pu, 10±5MBq/km2 for 241 Am and 1. 2±0. 7GBq/km2 for 137Cs, respectively. The activity ratios, of 239,240Pu/137Cs and 241Am/239,240Pu ranged from 0.016 to 0.026 (with a mean value of 0.020±0.004) and 0.35 to 0.49(with a mean value of 0.43±0.05), respectively. The relation between the inventories of these nuclides and excess210Pb in soils was also discussed. |
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| Keywords: | plutonium americium cesium tadionuclide |
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