First application of plutonium in soil erosion research on terraces  

作　　者：Yong-Jing Guan Wu Chen Shen-Zhen Wang Yu-Xin Hua Qiao-Yan Jing Zhi-Yong Liu Chun-Ping Huang De-Yu Wang Hui-Juan Wang Xian-Wen He Mario De Cesare Liang-Jia Cui Hua He Kai-Di Fan Zi-Chen Guo 

机构地区：[1]Guangxi Key Laboratory for Relativistic Astrophysics,School of Physical Science and Technology,Guangxi University,Nanning 530004,China [2]State Key Laboratory of Radiation Medicine and Protection,School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions,Soochow University,Suzhou 215123,China [3]Radiation-Environment Management and Monitoring Station of Guangxi Zhuang Autonomous Region,Nanning 530222,China [4]Department of Large Ground Testing Facilities,CIRA-Italian Aerospace Research Centre,81043 Capua,Italy [5]Department of Mathematics and Physics,University of Campania“Luigi Vanvitelli”,81100 Caserta,Italy [6]INFN-National Institute for Nuclear Physics,Naples Section,80126 Naples,Italy

出　　处：《Nuclear Science and Techniques》2023年第4期41-53,共13页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(No.12175046);the Guangxi Natural Science Foundation(No.2021GXNSFBA196001);the One-HundredTalents Program of Guangxi Colleges。

摘　　要：The spatial distributions of ^(239+240)Pu and ^(137)Cs in soils from Longji Rice Terraces were investigated to evaluate soil erosion.The activity concentrations of ^(239+240)Pu and ^(137)Cs in the surface soils of the paddy fields were in the range of 0.089–0.734 and1.80–7.88 mBq/g,respectively.The activities of ^(239+240)Pu and ^(137)Cs showed very similar distribution trends,first increasing and then decreasing with increasing elevation.The 240Pu/239Pu atom ratios in the surface soils ranged from 0.162 to 0.232.The activities of ^(239+240)Pu and ^(137)Cs in the soil cores tended to be uniformly distributed within the plowed layer and declined exponentially below this depth.The mean soil erosion rates of Longji Rice Terraces estimated by ^(239+240)Pu and ^(137)Cs tracer methods were 5.44 t/(ha·a)and 5.16 t/(ha·a),respectively,which demonstrated that plutonium can replace ^(137)Cs as an ideal tracer for soil erosion research in the future.Landform features are the main factors affecting the distribution of plutonium and ^(137)Cs as well as soil erosion in the Longji Rice Terraces.

关 键 词：Soil erosion PLUTONIUM ^(137)Cs Tracer method TERRACES 

分 类 号：S157.31[农业科学—土壤学]