文章基本信息

标题：Analysis of 85Kr: a comparison at the 10-14 level using micro-liter samples
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作者：G. -M. Yang ; C. -F. Cheng ; W. Jiang 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2013
卷号：3
期号：1
DOI：10.1038/srep01596
语种：English
出版社：Springer Nature
摘要：The isotopic abundance of ⁸⁵Kr in the atmosphere, currently at the level of 10⁻¹¹, has increased by orders of magnitude since the dawn of nuclear age. With a half-life of 10.76 years, ⁸⁵Kr is of great interest as tracers for environmental samples such as air, groundwater and ice. Atom Trap Trace Analysis (ATTA) is an emerging method for the analysis of rare krypton isotopes at isotopic abundance levels as low as 10⁻¹⁴using krypton gas samples of a few micro-liters. Both the reliability and reproducibility of the method are examined in the present study by an inter-comparison among different instruments. The ⁸⁵Kr/Kr ratios of 12 samples, in the range of 10⁻¹³to 10⁻¹⁰, are measured independently in three laboratories: a low-level counting laboratory in Bern, Switzerland, and two ATTA laboratories, one in Hefei, China, and another in Argonne, USA. The results are in agreement at the precision level of 5%.