Particle-size dependent distribution of thorium and uranium isotopes in soil

被引：0
作者：
O. Frindik
S. Vollmer
机构：
[1] Federal Research Centre for Nutrition,Central Laboratory of Isotope Studies
来源：
Journal of Radioanalytical and Nuclear Chemistry | 1999年 / 241卷
关键词：
Particle Size; Uranium; Particle Size Distribution; Isotope Ratio; Thorium;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Undisturbed, non-fertilized woodland soil (“loamy sandy soil” type) from 1 m below surface was dry and wet sieved. Sieving fractions of <10–1000 μm were analyzed for total alpha-activity. Thorium and uranium contents were determined by alpha-spectrometry after radiochemical separation. Soluble and insoluble parts of thorium and uranium were determined in the sieved fractions indicating that the isotope distribution in soil correlates with the particle size distribution: The smaller the size fraction the higher the isotope content. Isotope ratios of228Th/232Th, and234U/238U are discussed.
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页码：291 / 296
页数：5
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