Sichkar' G A
Med Tekh. 1993 Sep-Oct(5):14-7.
This development relates to nuclear engineering, concerns the sources of ionizing radiation of iodine radionuclides and the ways of their manufacture. The iodine radionuclides are used for calibration of radiometers that measure the specific activity of iodine radionuclide in biological specimens, in particular for their use to identify noncancer diseases. The purpose of the paper is to design a routine activity sample for iodine radionuclide in the solid-state source for transfer of an iodine radionuclide activity unit from the reference iodine radionuclide activity unit to an operating meter with a simultaneous decrease in testing errors and an increase, in terms of iodine radionuclide half-life, in the life of the reference sample by stabilizing the activity unit of iodine radionuclide (in terms of its half-life) by eliminating the process of sublimation of iodine radionuclide from the working surface of the source. The objective is achieved by the fact that the radionuclide is replaced on the lower internal build-up part of the container, fixed with the upper internal build-up part, then kept for at least 10-12 hours at least at 18-20 degrees C, packed into a hollow container and sealed with epoxide resin. According to the proposed technical design, reference activity samples of iodine radionuclide in the solid-state radiometric source with a preset activity value have been prepared. The testing error for iodine radionuclide activity is minimal and equal to 1.0-3.0% at a 0.95 confidence.
这一进展涉及核工程，关乎碘放射性核素的电离辐射源及其制造方法。碘放射性核素用于校准测量生物样本中碘放射性核素比活度的辐射计，特别是用于识别非癌疾病。本文的目的是设计一种固态源中碘放射性核素的常规活性样本，用于将碘放射性核素活性单位从参考碘放射性核素活性单位转换至运行中的测量仪，同时减少测试误差，并通过稳定碘放射性核素的活性单位（就其半衰期而言），消除碘放射性核素从源工作表面升华的过程，从而延长参考样本以碘放射性核素半衰期计的寿命。该目标通过以下方式实现：将放射性核素置于容器内部下方的累积部分，与上方内部累积部分固定，然后至少在18 - 20摄氏度下保持至少10 - 12小时，装入中空容器并用环氧树脂密封。根据所提出的技术设计，已制备出具有预设活性值的固态辐射源中碘放射性核素的参考活性样本。在0.95置信度下，碘放射性核素活性的测试误差最小，为1.0 - 3.0%。
