测量方法对125I密封籽源活度值的影响研究
Study of apparent activity measurement of Iodine-125 sealed seed source
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摘要: 目的 研究各种因素(包括测量的几何位置、不同容器、自屏蔽、容器壁厚等)对125I密封籽源表观活度测量的影响,建立理想的测量条件。方法 将125I密封籽源直立在1ml尖底放免管中,放入CRC-15R活度计的小托盘中进行测量。结果 不同测量条件对125I密封籽源表观活度测量有影响。结论 在最佳测量条件下,测量的125I密封籽源表观活度比较准确。Abstract: Objective Effect of all kinds of determined parameter (example for geometry seat, self-shield, container and thickness of wall of container, etc) on the apparent activity of 125I sealed seed source was briefly described in this paper, the optimal condition of measurement was established. Methods Iodine-125 sealed seed source is inserted erectly in the lml peaked bottom tube, and is determined with CRC-15 radioactive calibrator. Results The condition of measurement can affect the apparent activity value of 125I sealed seed source. Conclusions Theapparent activity measurement of 125I sealed seed source was exact under the optimal condition.
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Key words:
- I25I sealed seed source /
- apparent activity /
- measurement
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