北京地区室外氡浓度变化规律的研究  

VARIATIONS AND LEVELS OF OUTDOOR RADON CONCENTRATION IN BEIJING AREA

作　　者：张亮[1] 黄林[1] 郭秋菊[1] 

机构地区：[1]北京大学物理学院技术物理系,北京100871

出　　处：《辐射防护》2008年第5期286-291,共6页Radiation Protection

基　　金：国家自然科学基金资助项目(项目号:10775007);国家基础科学人才培养基金(北京大学核物理基地)资助(理科基地基金号:J0730316)

摘　　要：为观察研究室外大气氡浓度的变化规律,本文对北京地区2003年1月~2007年12月5年间通过连续测量装置获取的室外大气氡浓度的36 731个数据进行了分析研究,对日变化规律,年变化规律及5年间的变化趋势等进行了详细分析。5年内室外氡浓度平均值为12.1±4.9 Bq/m3,5年的年平均值略有不同,变化范围为11.24~13.01 Bq/m3。日变化中,最大值出现于6~8时、最小值出现于16~18时的频率最高。年变化规律中,最大值出现在10、11月,最小值出现在4、5月。To study the variations and levels of outdoor radon concentration in Beijing area, continuous measurement was performed hourly over a five-year period from January 2003 to December 2007. With 36731 measured data, the levels and variations were analyzed, the trend of diurnal and annual variations were stud- ied. The range of average concentration of outdoor radon each year was from 11.2 Bq·m-3 to 13.0 Bq·m-3, while the average concentration of the five years was 12.1 ±4.9 Bq·m-3 . The average diurnal pattern of radon concentration showed that diurnal maximum appears between 6：00 and 8：00 am, and the minimum appears between 16：00 and 18：00 pm. The annual pattern features a maximum in October and November and a minimum in April and May.

关 键 词：室外氡 连续测量 北京 

分 类 号：X51[环境科学与工程—环境工程]