陶瓷材料放射性核素测量样品衰变时间研究及最短平衡周期的确定

The Radioactive Decay Time of Ceramic Materials Radionuclide Test Specimen and Determination of the Shortest Decay Balance Cycle

简述了陶瓷材料放射性衰变平衡的基本理论,利用碘化钠γ谱仪对0-27 d内不同衰变时长的3组样品进行比活度测定,采用t检验法分析了同一组样品在不同衰变时间条件下放射性测量结果之间的差异程度。研究表明,若确保检测结果数据的显著性差异水平为5%,则样品最短衰变时间应不小于12 d。

This paper sketched the theory of radioactive samples' decay balance cycle The specific activity of three groups of specimens with the radioactive decay balance time between 0 to 27 days was tested by sodium iodide γ-ray detector, then the differences between test results of the same specimen after different decay balance time were analyzed using t-test method. Researches show that if the significant difference between the test results is 5%, the shortest radioactive decay time should not be less than 12 days.