DDL-1气氡仪用于嘉峪关断层气氡日常观测的可行性研究  

Feasibility study of DDL-1 gas radon meter applied to daily observation of gas radon measurement in Jiayuguan faults

作　　者：尚俊斌 马兰 张俏丽 曹喜 李阳阳 张贵文 巩丹丹 Shang Junbin;Ma Lan;Zhang Qiaoli;Cao Xi;Li Yangyang;Zhang Guiwen;Gong Dandan(Lanzhou Institute of Seismology,China Earthquake Administration,Lanzhou 730000,China)

机构地区：[1]中国地震局兰州地震研究所,兰州730000

出　　处：《地震学报》2025年第1期145-151,共7页Acta Seismologica Sinica

基　　金：甘肃省地震局地震科技发展基金项目(KY2103010)资助。

摘　　要：针对闪烁室法测氡仪在使用中存在的观测环节多、降本底耗时、固体源活度失准、仪器校准不准确、计算过程繁琐等问题,嘉峪关台引进一台DDL-1气氡仪进行试验研究,就仪器工作原理、主要技术参数、校准流程、观测数据稳定性等方面与FD-125氡钍分析仪进行对比分析。结果表明:DDL-1气氡仪在仪器校准方面优势明显,其操作简单,能够自动完成K值计算,有效缩短校准时长;定时定量观测模式下,两套仪器观测曲线同步性较好,仪器运行稳定;在降本底方面,DDL-1气氡仪虽有了显著改善,但仍存在气温较高时本底难降的问题;进行连续测量时,DDL-1气氡仪测值持续降低,且在冬季其导气管容易结冰,无法完成全年的连续观测任务,因此DDL-1气氡仪暂时还不适用于嘉峪关断层气氡的日常连续观测。To address issues associated with scintillation chamber radon measurement instruments-such as complex observation procedures,time-consuming background reduction,inaccurate solid-source activity,imprecise instrument calibration,and cumbersome calculation processes.Jiayuguan seismic monitoring station conducted experimental research using the DDL-1 gas radon meter.The study compared the DDL-1 gas radon meter with the FD-125 radon-thoron analyzer in terms of working principles,key technical parameters,calibration procedures,and data stability.The results indicate that the DDL-1 gas radon meter offers significant advantages in instrument calibration,with simplified operation and automatic K-value calculation,effectively shortening calibration time.Under fixed time and quantitative observation modes,the observation curves of both instruments were synchronized,and the DDL-1 detector operated stably.However,despite notable improvements in background reduction,the DDL-1 gas radon meter still faced challenges in reducing background levels under high temperatures.Additionally,during continuous measurements,the detector’s readings consistently declined,and its air inlet pipes were prone to freezing in winter,which prevented year-round continuous observations.Consequently,the DDL-1 gas radon meter is not yet suitable for daily continuous monitoring of radon in the Jiayuguan fault.

关 键 词：DDL-1气氡仪 FD-125氡钍分析仪 断层气氡 适?用?性 

分 类 号：P315.62[天文地球—地震学]