- 作者: 邢雲書; 周金良
- 作者服務機構: Contribution from the Radiochemistry Laboratory, Ordnance Research Institute
- 中文摘要: A rapid method for the determination of thoria content in Taiwan monazite sand and its associated minerals, zircon, and ilmenite, is presented. The method is gamma scintillation spectrometric, taking the area under the composite photopeak of Ra-224 (0.241 Mev) and Pb-212 (0.239 Mev) as a measure of the thoria content. It is applicable to minerals with thoris content ranging from 10% to 0.01%. the relative standard deviation is 3%. A determination can be made within one hour directly on the sample.
- 英文摘要: --
- 中文關鍵字: --
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