文章基本信息

标题：Determination of specific activity of cobalt (60Co/Co) in steel samples exposed to the atomic bomb in Hiroshima.
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作者：TOSHIMASA KIMURA ; NAOTO TAKANO ; TOSHIYUKI IBA 等
期刊名称：Journal of Radiation Research
印刷版ISSN：0449-3060
电子版ISSN：1349-9157
出版年度：1990
卷号：31
期号：2
页码：207-213
DOI：10.1269/jrr.31.207
摘要：Specific activity 60 Co/Co in two steel samples taken at 687m S and 1295m NNW from the hypocenter was measured by gamma-ray spectrometry and neutron activation analysis. The results were, respectively, (2.64 ± 0.38) × 10 1 and (3.09 ± 0.48) × 10 -1 dpm/mg Co at the time of bombing, which are consistent with previous data by Hashizume et al. for steel rings on the surface of roofs of buildings. The present data are expected to serve as verification of the bomb neutron transport calculations. Content of nickel and copper in the samples, determined by colorimetric and neutron activation methods, respectively, was too small to account for any significant 60 Co production by the (n, p) and (n, α) reactions.
关键词：Atomic bomb; Neutron induced activity; 60 Co; Steel; Sample preparation; Gamma-ray spectrometry