title: 222Rn in groundwater in Nigeria: a survey.
abstract: 222Rn in groundwater was measured in wells of different rock types in Nigeria by direct gamma counting. Concentrations ranged between 1.7 +/- 0.1 and 161.6 +/- 2.4 Bq L-1, with only slight variations (maximum 2.1 sigma from the mean) in a year in a typical well.
authors.affiliation: Department of Physics, University of Ibadan, Nigeria.
authors.forename: I P
authors.initials: IP
authors.lastname: Farai
authors.forename: A O
authors.initials: AO
authors.lastname: Sanni
mesh_terms: D009549:Nigeria; D011886:Radon / Q000032:analysis*; D014875:Water Pollutants, Radioactive / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D014875:Water Pollutants, Radioactive; D011886:Radon