开环式测量氡析出率  

Measurement of Radon Exhalation Rate in Open Loop

作　　者：谭延亮[1,2] 肖德涛[2] 赵桂芝[2] 周青芝[2] 肖田[1] 周毅[1] 

机构地区：[1]衡阳师范学院物电系,湖南衡阳421008 [2]南华大学核科学技术学院,湖南衡阳421001

出　　处：《计量学报》2013年第1期76-78,共3页Acta Metrologica Sinica

基　　金：国家自然科学基金（11075049）;湖南省“十二五”重点学科

摘　　要：对开环式测量氡析出率方法进行了验证，测得的介质表面氡析出率与参考值符合得较好。通过理论分析得到了集氡罩内的氡浓度趋于恒定值的时间表达式；提出了采用底面积较大的集氡罩，并加一调节阀来调低泵的流量的方法来提高集氡罩内的氡浓度，减小RAD7测量时的统计涨落。The measurement system for radon exhalation rate in open loop is validated. It shows that the radon exhalation rate from medium surface obtained is very good to match the reference value. The time expression when the radon concentration in the chamber tends to a constant value is obtained by theoretical analysis. A method is proposed that a chamber with bigger bottom acreage is used and a adjust valve is added to lower the flux of pump, such increasing the radon concentration in the chamber and reducing the statistical fluctuation in the measurement with RADT.

关 键 词：计量学 氡析出率 开环 

分 类 号：TB98[一般工业技术—计量学]