Khan A J
Department of Applied Physics, Z.H. College of Engineering and Technology, Aligarh Muslim University, India.
Health Phys. 1991 Oct;61(4):535-8. doi: 10.1097/00004032-199110000-00009.
Radon daughter concentrations have been measured in some public and private buildings of Aligarh city. Approximately 320 CR-39 detectors were mounted in 30 sample sites. It was found that the Rn daughter concentrations vary from 3.5 mWL to 8.1 mWL with a geometric mean of 5.6 +/- 1.3 mWL. The average annual effective dose equivalent due to Rn daughters is found to be 1.46 mSv using an equilibrium factor of 0.45 and an occupancy factor of 0.8. About 33% of buildings were estimated to have a Rn concentration below 40 Bq m-3 and 79% below 60 Bq m-3. The measured levels do not require any intervention as recommended by the U.S. Environmental Protection Agency.
已对阿里格尔市的一些公共和私人建筑中的氡子体浓度进行了测量。在30个采样点安装了约320个CR - 39探测器。结果发现，氡子体浓度在3.5毫瓦小时每升至8.1毫瓦小时每升之间变化，几何平均值为5.6±1.3毫瓦小时每升。使用平衡因子0.45和占用因子0.8，得出因氡子体导致的年平均有效剂量当量为1.46毫希沃特。估计约33%的建筑物氡浓度低于40贝克勒尔每立方米，79%低于60贝克勒尔每立方米。根据美国环境保护局的建议，所测水平不需要任何干预。
