title: Radon measurements by nuclear track detectors in secondary schools in Oke-Ogun region, Nigeria.
abstract: Radon measurements were performed in secondary schools in the Oke-Ogun area, South-west, Nigeria, by solid state nuclear track detectors (SSNTDs). About seventy CR-39 detectors were distributed in 35 high schools of the Oke-Ogun area. The CR-39 detectors were exposed in the schools for 3 months and then etched in NaOH 6 N solution at 90 °C for 3 h. The tracks were counted manually at the microscope and the radon concentration was determined at the Radioactivity Laboratory, Department of Physics, University of Trieste, Trieste, Italy. The overall average radon concentration in the surveyed area was 45 ± 27 Bq m(-3). The results indicate no radiological health hazard. The research also focused on parameters affecting radon concentrations such as the age of the building in relation to building materials and floor number of the classrooms. The results show that radon concentrations in ground floors are higher than in upper floors.
authors.affiliation: Department of Physics, University of Ibadan, Ibadan, Nigeria. rachelobed@yahoo.com
authors.forename: R I
authors.initials: RI
authors.lastname: Obed
authors.forename: A K
authors.initials: AK
authors.lastname: Ademola
authors.forename: M
authors.initials: M
authors.lastname: Vascotto
authors.forename: G
authors.initials: G
authors.lastname: Giannini
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis*; D005430:Floors and Floorcoverings; D006801:Humans; D009549:Nigeria; D011874:Radiometry / Q000379:methods*; D011886:Radon / Q000032:analysis*; D018570:Risk Assessment / Q000379:methods; D012574:Schools
chemical_list: D000396:Air Pollutants, Radioactive; D011886:Radon