基于射气闪烁法精确测量水中镭-226

辐射防护通讯 ›› 2023, Vol. 43 ›› Issue (6): 25-30.

基于射气闪烁法精确测量水中镭-226

吕洪震¹, 谢凌涛¹, 刘扬², 李擎¹, 边宝丽¹, 陈士恒²

1.北京华科仪科技股份有限公司,北京, 100076;
2.核工业北京化工冶金研究院,北京, 101149

收稿日期:2023-01-31 出版日期:2023-12-20 发布日期:2024-01-22
通讯作者: 陈士恒。E-mail:89387815@ qq.com
作者简介:吕洪震(1995—),男,2018年本科毕业于河北大学,2021年硕士毕业于河北大学,研发工程师。E-mail:36383918@qq.com

Accurate Measurement and Uncertainty Evaluation of ²²⁶Ra Based on Emanation Scintillation Method

Lv Hongzhen¹, Xie Lingtao¹, Liu Yang², Li Qing¹, Bian Baoli¹, Chen Shiheng²

1. Beijing Huakai Technology Co. LTD., Beijing 100076;
2. Beijing Research Institute of Chemical Metallurgy for Nuclear Industry, Beijing 101149

Received:2023-01-31 Online:2023-12-20 Published:2024-01-22

摘要/Abstract

摘要： 镭含量的检测对铀矿勘探、放射性环境监测和评价具有重要作用,因此对镭进行精准检测具有重要意义。本文基于射气闪烁法,研制了水中镭预浓缩装置和镭氡检测送气仪,建立了水中镭-226浓度精准测量系统,解决了传统实验方法存在的流量控制不精确、氡气收集不完全、系统压力难以探知等问题。本文搭建的系统具有良好的测量准确性和稳定性,测量回收率为87.5%~101%,相比于传统实验方法回收率提高4.79%~8.39%。

关键词: 射气闪烁法, 自动送气, 镭-226

Abstract: The detection of radium content plays an important role in uranium exploration, radioactive environment monitoring and evaluation. Therefore accurate detection of radium is of great significance. Based on the emenation scintillation method, a radium pre-concentration device in water and a radium radon detection instrument were developed. An acurate concentration measurement system of radium-226 was established. The problems such as inaccuracy of flow control, incomplete radon collection and difficult to detect system pressure in traditional experimental methods are solved. The results show that the proposed system has good measurement accuracy and stability, and the measured recovery rate is 87.5%-101%, which is 4.79%-8.39% higher than that of the traditional experimental method.

Key words: Emanation scintillation method, Automatic air supply, ²²⁶Ra

中图分类号:

X830.2

吕洪震, 谢凌涛, 刘扬, 李擎, 边宝丽, 陈士恒. 基于射气闪烁法精确测量水中镭-226[J]. 辐射防护通讯, 2023, 43(6): 25-30.

Lv Hongzhen, Xie Lingtao, Liu Yang, Li Qing, Bian Baoli, Chen Shiheng. Accurate Measurement and Uncertainty Evaluation of ²²⁶Ra Based on Emanation Scintillation Method[J]. RADIATION PROTECTION BULLETIN, 2023, 43(6): 25-30.

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