对几种固体氡源在标定测氡仪器中性能的探析

Performance of Several Kinds of Solid Standard Source in the Calibration of Radon Measurement Instrument

对测氡仪器进行精确标定是氡测量工作中的重要环节,分析了目前国内常用的三种固体源(RN-150型、GD-L2流气式型、RN-FD循环式型)在结构原理、使用操作方法两方面的差异,并讨论了这些差异对标定结果准确度的影响。分析认为:RN-FD型循环式固体氡气源是目前正在使用的几种氡气源中系统误差最小、标定效率最高、维护成本最低的氡标准气源。在实际使用中,应根据固体氡气源的结构原理特点,尽量避免不必要的操作误差,减少对标定结果准确度的影响。

Calibrating radon measurement instrument precisely is an important step in radon measurement. This paper analyzes the differences between the structure principle and the operation methods of the three domestic commonly used solid sources（RN-150 type, GD-L2 current type and RN-FD circular type）. It also discusses the influence of the differences on the accuracy of the calibration results. It suggests that the solid source RN-FD circular type is the standard radon gas source with the minimal system error, the highest calibration efficiency and the lowest maintenance cost among the several currently used radon gas sources. In actual use we should try to avoid unnecessary operating errors based on the characteristics of the structure principle of standard radon gas source, thus reducing the influence on the accuracy of the calibration results.