| Ge（Li）γ谱仪测量^135U的丰度 |
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| 引用本文： | 盛正直,顾鼎祥,赵云龙.Ge（Li）γ谱仪测量^135U的丰度[J].地球化学,1983(4):357-363. |
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| 作者姓名： | 盛正直 顾鼎祥 赵云龙 |
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| 摘 要： | In this paper a technique for determining ^235U abundance is described. After chemical separation, uranium-rich ore (a compound of uranium with chemical and radioactive pure)is made into U3O8 by burning at 850℃, and then the U3O8 is prepared as the radioactive measuring source with a definite weight and shape. The measurement is carried out of the net area of 185.7 keV γ -ray peak of ^235U by Ge (Li) γ -ray spectrometer, with the mixture of a number of primary uranium ores as normal abundance standard. Parallel analysis and counting are performed on the standard and samples with the same method. The abundance of ^235U will be known by comparing their net areas of 185.7 keV γ ray peaks of ^235U both in the samples and the standard. Two samples of uranium ore from China which are suspected to be anomalous in U abundance and one sample from Oklo natural reactor have been determined. The precision of the method is better than 1%.
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| 关 键 词： | Ge（Li）γ谱仪测量 铀 原子丰度 纯化 |
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