期刊论文

γ-γ Coincidence Method Used to Calibrate the Optimal Pulse Width of ^60Co Source Radioactivity

中文

核电子学与探测技术

0258-0934

2017

37

8

772-777

10.3969/j.issn.0258-0934.2017.08.004

本校为第一机构

论文介绍了γ-γ符合法标定^60Co源放射性活度最佳脉冲宽度的测定方法。该方法适用于辐射源活度A≤5×10^6Bq的标定,通过优化各插件设置的参数,对在不同脉冲宽度下计算得到的活度与实验室时参考源活度进行比较,快速进行标定,同时对实测真偶符合比与反推真偶符合比进行比较。实验结果表明：γ-γ符合法测量辐射源活度时,无限增大真偶符合比对实际测量无太大的意义,测量结果计算得到的^60Co辐射源的活度为141 441 Bq,与实验时源的参考活度相对偏差为0.252%,γ-γ符合法标定^60Co源放射性活度的最佳脉冲宽度为0.39μs。

This paper elaborates the γ-γ coincidence method used to calibrate the optimal pulse width of 60Co source radioactivity. The method is applicable to the calibration of the radiation source activity A≤ 5×106Bq. By optimizing the parameter of each plugin configuring, it compares the activities calculated at different pulse widths with the reference source activities in the laboratory so as to make a quick calibration. At the same time, it compares the measured true and even coincidence ratio with the inverse one. The experiment turns out that...