title: Radon daughter levels in some public and private buildings in India.
abstract: 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.
authors.affiliation: Department of Applied Physics, Z.H. College of Engineering and Technology, Aligarh Muslim University, India.
authors.forename: A J
authors.initials: AJ
authors.lastname: Khan
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis*; D001729:Bismuth / Q000032:analysis*; D007194:India; D007854:Lead / Q000032:analysis*; D011059:Polonium / Q000032:analysis*; D017687:Radon Daughters
chemical_list: D000396:Air Pollutants, Radioactive; D017687:Radon Daughters; D007854:Lead; D011059:Polonium; D001729:Bismuth