长白山区土壤中^(90)Sr、^(239+240)Pu纵向分布研究  

Study of the Concentration Distribution of ^(90)Sr and ^(239+240)Pu in the Vertical Direction in Soil of Chang-bai Mountain

作　　者：喻正伟[1] 李军[1] 张文芊 吴永乐[1] 李锦[1] 肖鹏 杨斌[1] 唐丽丽[1] 

机构地区：[1]环境保护部核与辐射安全中心,北京100082

出　　处：《核电子学与探测技术》2017年第5期536-540,共5页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金资助项目:北京市大气中放射性活度历史值评估(基金号:11405071)

摘　　要：研究了^(90)Sr、^(239+240)Pu在同一点位土壤中的纵向分布情况和迁移特性。在长白山未受人类活动影响的点位分层采集不同深度的土壤样品,用放射化学的方法测量样品中^(90)Sr、^(239+240)Pu的活度浓度。研究发现:在同一点位,表层土壤中^(90)Sr、^(239+240)Pu活度浓度比深层土壤高,且这种分布趋势非常明显;随着深度增加,^(239+240)Pu活度浓度迅速减少,^(90)Sr活度浓度则是逐步减小。研究表明:采样点土壤中^(239+240)Pu向下的迁移不明显,主要分布在0~10 cm的表层土壤中,而^(90)Sr则有一定程度的迁移,但在0~10 cm的表层土壤中含量最高。In the chang-bai mountain, where no human activity was present, many soil samples in different depth were collected, and the concentration of ^90Sr、^239＋240Pu were determined for studying there distribution in the vertical direction in soil at the same point. The results show that,^90Sr、^239＋240Pu were both mostly stored in ten centimeters under the surface, and ^90Sr seeped into the underground slowly but ^239＋240pu were nearly stagnant.

关 键 词：土壤 ^90Sr、^239+240Pu 纵向分布 

分 类 号：TL51[核科学技术—核技术及应用]