Aiming at quantifying high-purity uranium (²³⁵U/²³⁶U/²³⁸U) in coatings, a series of experiments were carried out by a dedicated small solid angle device. The physical design of the device and the small solid angle method were here in described, focus in particular on the analysis of detection efficiency, the effect of the isotope impurity in the coatings and the correction for the non-uniform distribution of the uranium samples. The results show that the weight of ²³⁵U in the coatings is 5.2–5.6 mg, while 4.7–5.0 mg for ²³⁸U and 2.2 mg for ²³⁶U in the corresponding coatings, with relative experimental uncertainties of 1.0%–-1.2%.

中文翻译：

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用小立体角法准确定量涂料中的高纯度铀。

为了量化涂料中的高纯度铀（²³⁵ U / ²³⁶ U / ²³⁸ U），通过专用的小型立体角设备进行了一系列实验。这里描述了装置的物理设计和小立体角法，特别着重于检测效率的分析，涂层中同位素杂质的影响以及对铀样品非均匀分布的校正。结果表明，涂层中²³⁵ U的重量为5.2–5.6 mg，而相应涂层中²³⁸ U的重量为4.7–5.0 mg，²³⁶ U的重量为2.2 mg ，相对实验不确定度为1.0％-1.2％。