First results on 236U levels in global fallout
First results on 236U levels in global fallout
复制标题
DOI：
10.1016/j.scitotenv.2009.01.058
复制
发表时间：
2009-07-01
影响因子：
9.8
通讯作者：
Yamamoto, M.
中科院分区：
文献类型：
--
作者：
Sakaguchi, A.;Kawai, K.;Yamamoto, M.
本文通过对土壤中U-236、Pu 239 +240和（CS）-C-137的测定，推断了全球沉降物在土壤中的浓度。Pu 239 +240和U-238的浓度通过α粒子光谱法测定。而U-236/U-238比率用加速器质谱（AMS）测量。结果表明，U-236/Pu-239的比值在0.212 ~ 0.253之间，据此估算，全球U-236沉降到地球上的总量约为10000吨。九百公斤。这一知识将有助于促进在地球资源、废物管理和地球化学领域对铀同位素，包括铀236的研究。(C)2009 Elsevier B. V.保留所有权利。
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.