Abstract

As a matter of fact, overlapping of γ-transitions of different isotopes is a source of error and obstacle to get accurate and confident results. It must be considered and corrected for. In this work, different approaches are given to purify the gamma line 185.71 keV of ²³⁵U from any contribution and overlapping due to 186.21 keV of ²²⁶Ra. The approaches were applied on natural environmental samples. A highly efficient HPGe detector with its electronics was used for identifying and determination of ²³⁵U, ²³⁸U and ²²⁶Ra based on their gamma transitions. The calculated ²³⁵U/²³⁸U activity ratios after correction and removing contribution of 186.21 keV of ²²⁶Ra were found to be optimal and typical natural values; 0.046. The results are tabulated and depicted for natural ore samples, phosphate and black sand samples.

中文翻译：

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从另一个重叠的γ跃迁的贡献中纯化235 U的185.7 keV的不同方法

摘要

实际上，不同同位素的γ-跃迁重叠是获得准确和可信结果的错误和障碍的来源。必须考虑并纠正它。在这项工作中，给出了不同的方法来纯化²³⁵ U的伽马线185.71 keV，以消除由于²²⁶ Ra的186.21 keV而造成的任何贡献和重叠。该方法应用于自然环境样品。高效的HPGe检测器及其电子设备用于根据γ跃迁识别和确定²³⁵ U，²³⁸ U和²²⁶ Ra。在校正和去除186.21 keV的贡献后，计算得出的²³⁵ U / ²³⁸ U活度比。²²⁶ Ra被认为是最佳且典型的自然值；0.046。将天然矿石样品，磷酸盐和黑砂样品的结果制成表格并进行描述。