一种测氡仪标定装置设计及标定方法实验研究

Design of a Radon Meter Calibration Device and Experimental Study on Calibration Method

针对地震氡观测,当前面临着现有固体氡气源无法向上量值溯源和老化损坏的问题,利用老化损坏固体氡气源中的镭源设计了一种测氡仪标定装置和一种配套的标定方法,实验验证和对比评估表明,氡气在该装置中可以达到较好的衰变平衡,提出的体积置换标定法能够有效保证标定期间装置内氡浓度的稳定性,与计量技术机构常用的HD-6型多功能自控氡室的标定结果间有较好的一致性,为地震氡观测量值向上溯源提供了新的技术方法,对推动地震氡观测计量体系建设具有积极意义。同时,通过重复利用,实现了对老化损坏固体氡气源的科学处置。

In view of the problems that existing solid radon sources cannot be traced up and are damaged by aging in seismic radon observation,a radon meter calibration device and a complementary calibration method are designed by using the radium source in the solid radon source.Experimental verification and comparative evaluation show that radon can achieve a satisfactory long-term decay equilibrium in this device.'The proposed volumetric displacement calibration method can effectively ensure the stability of radon concentration in the device during calibration,and has a good consistency with the calibration results of HD-6 multifunctional automatic radon chamber commonly used by metrological technica institutions.It provides a new technical method for the upward traceability of seismic radon observation values,and has positive implications for advancing the construction of the seismic radon observation metrological system.Meanwhile,the scientific disposal of solid radon sources damaged by aging is realized through reuse.