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本文研究了适用于固体径迹探测器的天然铀、浓缩铀及镎电沉积薄源的制备条件。在(NH_4)_2C_2O_4体系中,毫克量级的铀电沉积1小时,沉积率大于(99.0±0.4)%。在(NH_4)_2C_2O_4-HNO_3介质中,亚毫克量级的镎电沉积1小时,沉积率为(93.1±4.9)%。为了提高涂层定量的准确性,本文推导了从涂层放射性强度换算质量厚度的公式。在分光光度法测定残余电解液铀含量时,严格控制还原条件,提高了分析测定的准确性(标准误差为±1.0%)。应用物理测定源强度与化学分析对比了涂层定量的准确性,符合较好。采用醋酸纤维膜α固体径迹法检查了源的均匀性。
In this paper, the preparation conditions of natural uranium, enriched uranium and thin electrodeposits for solid track detectors are studied. In (NH_4) _2C_2O_4 system, micrograms of uranium electrodeposited for 1 hour, the deposition rate was greater than (99.0 ± 0.4)%. In (NH_4) _2C_2O_4-HNO_3 media, sub-milligram electrodeposition was performed for 1 hour and the deposition rate was (93.1 ± 4.9)%. In order to improve the accuracy of the coating quantitative, this article deduces the formula of mass thickness converted from the radioactive intensity of the coating. When spectrophotometric determination of residual electrolyte uranium content, strictly control the reduction conditions, improve the accuracy of the analysis (standard error of ± 1.0%). Comparing the quantitative accuracy of the coating with the physical strength of the source and the chemical analysis, it is in good agreement. The homogeneity of the source was examined using an acetate fiber membrane α solid track method.