Investigation of the migration of Np-237 in loess by direct gamma-ray   method

doi:10.1007/s10967-006-6831-2

CORC > 北京大学 > 化学与分子工程学院

	Investigation of the migration of Np-237 in loess by direct gamma-ray method
	Liu, C. L. ; Ni, S. W. ; Han, X. S. ; Li, S. S. ; Wang, Z. M.
刊名	journal of radioanalytical and nuclear chemistry
	2007
关键词	NEPTUNIUM MIGRATION SORPTION SOIL
DOI	10.1007/s10967-006-6831-2
英文摘要	The migration of Np-237 in an undisturbed Chinese loess column was investigated by direct gamma-ray method. The column was taken from a field test site and installed in a laboratory simulation hall. Radionuclide Np-237 in the form of neptunium nitrate, mixed with quartz, was introduced into the column and covered with loess. Artificial rainfall was applied to the column for about 3 years and, the counting rates of Np-237 in the column from 56 to 616 days at different vertical positions were detected with a gamma-ray detection system. Based on the counting rates of Np-237 in the simulation column at different vertical positions and the distance from the source layer, the relationship of the mass center of Np-237 in the column at different experimental periods to the experimental time was established, C-m = 0.36 log(t)-2.75. Here C-m is the mass center of Np-237 in the column, cm, and t is the experimental time in days. Based on this relationship, the mass center of Np-237 for the 1,073-day experiment was predicted and compared to that obtained with the final destructive method. The good agreement between the prediction and the experimental values indicates that the direct gamma-ray method could be used to predict the migration of strongly adsorbed radionuclides such as Np-237 in environmental media with the help of laboratory simulation columns.; Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; SCI(E); 0; ARTICLE; 1; 161-166; 272
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/151568]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Liu, C. L.,Ni, S. W.,Han, X. S.,et al. Investigation of the migration of Np-237 in loess by direct gamma-ray method[J]. journal of radioanalytical and nuclear chemistry,2007.
APA	Liu, C. L.,Ni, S. W.,Han, X. S.,Li, S. S.,&Wang, Z. M..(2007).Investigation of the migration of Np-237 in loess by direct gamma-ray method.journal of radioanalytical and nuclear chemistry.
MLA	Liu, C. L.,et al."Investigation of the migration of Np-237 in loess by direct gamma-ray method".journal of radioanalytical and nuclear chemistry (2007).