| 张立国,郭秋菊.北京地区大气氡水平测量[J].中华放射医学与防护杂志,2005,25(1):81-82 |
| 北京地区大气氡水平测量 |
| Atmospheric radon level in Beijing |
| 投稿时间：2004-04-20 |
| DOI： |
| 中文关键词: 大气氡 连续测量 北京 |
| 英文关键词:Atmospheric radon Continuous measurement Beijing |
| 基金项目:国家自然科学基金资助项目(10175007) |
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| 中文摘要: |
| 目的 通过连续监测手段,分析和评价北京市环境大气中氡水平及其变化规律。方法 采用静电氡监测仪(ERMB1)对室外氡浓度进行长期连续测量,给出每小时的氡浓度。结果 通过对2003年整年测量数据的统计分析,得到北京地区室外大气氡水平年平均值为(14.1±5.5)Bqm3,全年最大值为40.4Bqm3(10月),最小值为2.7Bqm3(5月)。各月平均值分布在(9.9±4.1)Bqm3(5月)到(18.5±5.0)Bqm3(11月)之间;日变化中,最大值出现在6:00至8:00,最小值出现在16:00至18:00频率最高。结论 北京地区室外大气氡水平年平均值高于世界平均值和全国平均值,月平均最大值出现在11月,最小值出现在5月。 |
| 英文摘要: |
| Objective To analyze and estimate the atmospheric radon level in Beijing through continuous measurement. Methods Long term and continuous measurement has been carried out by using ERMB1(ERM: Electrostatic Radon Monitors ), which can supply hourly radon concentration. Results The annual average concentration of atmospheric radon in 2003 was (14.1±5.5) Bq/m3, the maximum was 40.4 Bq/m3 in October and the minimum was 2.7 Bq/m3 in May. For monthly average, the maximum was (18.5±5.0) Bq/m3 in November and the minimum was (9.9±4.1) Bq/m3 in May. For diurnal variation, the highest frequency could be described as the maximum appeared during 6:00-8:00 and that the minimum appeared during 16:00-18:00. Conclusion The atmospheric radon level in Beijing was higher than the world average and the national average as well. For monthly average, the maximum appeared in November and the minimum appeared in May. Typical diurnal variation was observed as well. |
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