痕量氡气测量仪器自动标定装置的研制  

Development of Automatic Device for Calibration of Trace Radon Analyzers

作　　者：黄凡[1] 廖志良[2] 黄龙珠 周书民[2] 汤彬[1] 张兴磊 陈焕文 

机构地区：[1]东华理工大学核技术应用研究所,南昌330013 [2]东华理工大学机械与电子工程学院,南昌330013 [3]江西省质谱科学与仪器重点实验室,南昌330013

出　　处：《分析化学》2011年第10期1506-1512,共7页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.11065002);国防基础预研项目(No.B3420110006);江西省自然科学基金(No.2010GZW0001)资助项目

摘　　要：研究了空气中痕量氡的动态稳定技术和氡及其子体浓度的准确测量方法。研制了具有氡浓度自动控制、温湿度调控、气溶胶发生/采集等功能的标准氡室,并建立了主氡室标称体积达4m3的氡测量仪器检定/校准装置和氡子体放射性气溶胶检测与实验研究平台。研究表明,本装置测氡浓度范围为370～20000Bq/m3;检测精确度达3%;单点校正时间为40min;单台仪器校正时间为7h,可同时进行3台主动式和4～6台被动式测氡仪的检定或校准,并能够按照检定/校准结果自动生成证书及报告,自动保存测量数据,且可以按多种方式进行查询。A dynamic stability technique for antomatic calibration of trace concentration of radon in the air and the method for the precise detection of the concentration of radon and radon decay products were tentatively investigated.A homemade standard radon chamber with the functions of autocontrolling radon concentration,temperature and humidity,formation and collection of aerosol,was constructed.Setting up a detective and experimental study platform for radon detection instrument calibration and calibration devices with a radon chamber of 4 m3.This also sveer asa sensitive analyzer for detction of the radon decay products in radioactive aerosol were carried out.The radon concentration detected by the device ranges from 370 Bq/m3 to 20000 Bq/m3 with the precision of 3%.The calibration time of the homemade standard radon chamber for a single point is 40 min and for a radon instrumentation was 7 h.Moreover,3 active mode radon instruments and 4 to 6 passive mode radon instruments can be corrected simultaneously.The certificate,report,data and results can be automatically generated and saved,and the operators can find the results in many ways.

关 键 词：测量方法 放射性 自动校正 

分 类 号：TH83[机械工程—仪器科学与技术]