First results on 236U levels in global fallout

被引：135
|
作者：
Sakaguchi, A. [1 ,3 ]
Kawai, K. [2 ]
Steier, P. [3 ]
Quinto, F. [3 ]
Mino, K. [2 ]
Tomita, J. [2 ]
Hoshi, M.
Whitehead, N.
Yamamoto, M. [2 ]
机构：
[1] Hiroshima Univ, Res Inst Radiat Biol & Med, Minami Ku, Hiroshima 7348553, Japan
[2] Kanazawa Univ, K INET, Low Level Radioact Lab, Nomi, Ishikawa 9231224, Japan
[3] Univ Vienna, Fak Phys Isotopenforsch, VERA Lab, A-1090 Vienna, Austria
来源：
SCIENCE OF THE TOTAL ENVIRONMENT | 2009年 / 407卷 / 14期
关键词：
Uranium-236; Global fallout; Accelerator mass spectrometry; ENVIRONMENTAL-SAMPLES; ANTHROPOGENIC U-236; MASS-SPECTROMETRY; SOIL SAMPLES; URANIUM; FIELD; RADIOACTIVITY; U-236/U-238; PLUTONIUM; ISOTOPES;
D O I：
10.1016/j.scitotenv.2009.01.058
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The global fallout U-236 level in soil was deduced from measurements of U-236, Pu239+240 and (CS)-C-137 in surface soils which are solely influenced by global fallout A total of 12 soil cores from the depths of 0-10, 0-20 and 0-30 cm were collected at a flat forest area in Japan. Concentrations of Pu239+240 and U-238 were determined by alpha-particle spectrometry. while the U-236/U-238 ratio was measured with accelerator mass spectrometry (AMS). Consistent U-236/Pu-239 ratios between 0.212 and 0.253 were found. Using this ratio, the total global fallout of U-236 on the earth is estimated to be as much as ca. 900 kg. This knowledge will contribute to the promotion of research on U isotopes, including U-236, for the fields of geo-resources, waste management and geochemistry. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：4238 / 4242
页数：5
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