Characterization of Pu concentration and its isotopic composition in a reference fallout material

	Characterization of Pu concentration and its isotopic composition in a reference fallout material
	Yongsan Zhang; Jian Zheng; Masatoshi Yamada; Fengchang Wu; YasuhitoIg arashi; Katsumi Hirose
	2010
Source Publication	Science of The Total Environment
Volume	408 Issue:5 Pages:1139-1144
Abstract	Because there is no reference material for fallout plutonium isotope monitoring, preparation of such a material is necessary for quality control of fallout radionuclides analysis for atmospheric environmental studies. In this work, we report the characterization of Pu activity and its isotopic composition in a reference fallout material prepared by the Meteorological Research Institute (MRI), Japan. This material was prepared from samples collected at 14 stations throughout Japan in 1963–1979, with reference values of ¹³⁷Cs, ⁹⁰Sr and ²³⁹ ⁺ ²⁴⁰Pu activities. We analyzed the activities of ²³⁹ ⁺ ²⁴⁰Pu and ²⁴¹Pu, and the atom ratios of ²⁴⁰Pu/²³⁹Pu and²⁴¹Pu/²³⁹Pu using an isotope dilution sector-field inductively coupled plasma mass spectrometry (SF-ICP-MS). The ²³⁹ ⁺ ²⁴⁰Pu activities in this fallout material using acid leaching and total digestion were 6.56 ± 0.20 mBq/g and 6.79 ± 0.16 mBq/g, respectively. Atom ratios of²⁴⁰Pu/²³⁹Pu were 0.1915 ± 0.0030 and 0.1922 ± 0.0044, respectively. Both ²⁴⁰Pu/²³⁹Pu and²⁴¹Pu/²³⁹Pu atom ratios were slightly higher than those of global fallout, which could be attributed to the deposition of fallout radionuclides resulting from the Chinese nuclear weapons tests conducted in the 1970s. The dominant host phases of ²³⁹ ⁺ ²⁴⁰Pu were found to be organic matter-sulfides (70%) with a relative high ²⁴⁰Pu/²³⁹Pu atom ratio, and Fe–Mn oxides (19%) using a sequential extraction method.
Subject Area	环境地球化学
Indexed By	SCI
Language	英语
Document Type	期刊论文
Identifier	http://ir.gyig.ac.cn/handle/352002/6886
Collection	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文环境地球化学国家重点实验室
Recommended Citation GB/T 7714	Yongsan Zhang,Jian Zheng,Masatoshi Yamada,et al. Characterization of Pu concentration and its isotopic composition in a reference fallout material[J]. Science of The Total Environment,2010,408(5):1139-1144.
APA	Yongsan Zhang,Jian Zheng,Masatoshi Yamada,Fengchang Wu,YasuhitoIg arashi,&Katsumi Hirose.(2010).Characterization of Pu concentration and its isotopic composition in a reference fallout material.Science of The Total Environment,408(5),1139-1144.
MLA	Yongsan Zhang,et al."Characterization of Pu concentration and its isotopic composition in a reference fallout material".Science of The Total Environment 408.5(2010):1139-1144.

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