地震监测氡观测仪器校准新方法研究

利用国际刻度参考装置AlphaGUARD测氡仪及水氡测量组件, 使用水中溶解氡(或豁免级氡气源), 开展代替目前氡气固体源校准方法实验。 对FD-125测氡仪标配的3个闪烁室(1#、 3#及5#)分别使用水中溶解氡和氡气固体源进行校准实验, 3个闪烁室的校准K值相对误差分别为5.06%, 1.92%及2.76%, 可以达到目前地震监测氡观测技术要求。 实验结果表明, 水中溶解氡代替氡气固体源校准, 可以解决目前氡气固体源校准中存在的运输困难、 维修技术要求高等问题, 是今后氡观测仪器校准技术的发展趋势。

A New Calibration Method of Emanometer in Earthquake Monitoring

By using AlphaGUARD radon measurement instrument, the international calibration reference device, we carried out a dissolved radon calibration experiment to replace the general calibration by solid source of radon gas. The three scintillation chambers (1 #, 3 # and 5 #) of FD-125 emanometer are calibrated respectively, and then are compared with the results of using solid source of radon gas. The results show that the error of k value using “dissolved radon calibration” relative to using solid source of radon gas were respectively 5.06%, 1.92% and 2.76%. The above results indicate that the newly developed calibration method instead of traditional solid source of radon gas accords with the radon observation technology requirement in earthquake monitoring system, and can solve difficulty in transportation and high technical maintenance requirements in the calibration using solid source of radon gas. It is the trend of radon calibration technology development in the future.