Limitations of gamma-ray spectrometry in the quantification of 238U and 232Th in raw materials and by-products
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- 作者：Young-Yong Ji ; Jong-Myoung Lim…
- 关键词：Gamma ; ray spectrometry ; 238U ; 232Th ; Interference ; Disequilibrium ; Raw materials ; By ; products
- 刊名：Journal of Radioanalytical and Nuclear Chemistry
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：311
- 期：2
- 页码：1163-1168
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Nuclear Chemistry; Physical Chemistry; Nuclear Physics, Heavy Ions, Hadrons; Diagnostic Radiology; Inorganic Chemistry;
- 出版者：Springer Netherlands
- ISSN：1588-2780
- 卷排序：311
文摘
The effect of interference and disequilibrium was evaluated in analyzing 238U and 232Th using gamma-ray spectrometry. The interference in 234Th as an indicator of 238U was considerably increased according to the activity level of 232Th compared with that of 238U. However, its correction was necessary to assume that the secular equilibrium in the thorium decay series must be secured in the material. In addition, the disequilibrium in the decay series can be easily shown in the chemical process for manufacturing materials. This makes the limitation in the indirect measurement of natural radionuclides using gamma-ray spectrometry, especially in chemically processed products.