土壤氡连续测量仪的研制

英文篇名：Development of radon in soil pore continuous monitor
中文刊名：核电子学与探测技术
英文刊名：Nuclear Electronics & Detection Technology
作者：刘良军
英文作者：LIU Liang-jun (Radon Laboratory ; University of South China ; Hengyang of Hunan Prov.421001 ; China)
中文关键词：氡 ; 连续测量 ; 地震
英文关键词：radon ; continuous measurement ; earthquakes
出版日期：2008-11-20
机构：南华大学氡实验室;
年：2008
期：06
出版单位：核电子学与探测技术

摘要

研制了一台土壤氡连续测量仪。仪器采用静电收集测氡法。通过测量总α衰变测量氡浓度。通过加入扩散距离消除土壤氡环境下~(220)Rn对~(222)Rn测量的干扰。~(218)sPo的静电收集效率大于60%。在氡浓度大幅度突变时,测量值达到真实值90%的时间在7小时以内。测量值不受温湿度变化的影响。仪器采用MCS51单片机为控制核心,能自动监测、长期保存测量数据、能通过通讯口传输数据。
An instrument for continuous measuring radon in soil pore is developed.The technique of elec- trostatic collecting radon progeny is used to measure radon concentration.Radon detection is based upon total counting of radon progenyα-decays.The diffusion distance is added to eliminate the effects of ~(220)Rn. The electrostatic collection efficiency of ~(218)Po is more than 60 percent.The time to reach 90% real value is less than seven hours after the radon concentration has a significant mutation.The changes of tempera- ture and humidity do not affect the measured result.Microprocessor MCS51 is used for auto-monitoring, preserving the measured data,and transferring data by communication terminal.

引文

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    [7]刘良军．基于orCAD的电荷灵敏前置放大器仿真设计[J]．核电子学与探测技术，2007，27(3)：425—427．