title: Natural radionuclides contents and radon exhalation rates in building materials used in South Korea.
abstract: The natural radionuclide (226Ra, 232Th and 40K) contents of building materials commonly used in South Korea have been determined by a gamma ray spectroscopy system using a high purity germanium detector. The radon exhalation rates and emanation coefficients of building materials have also been studied. The average concentrations of 226Ra, 232Th and 40K in building materials were in the range of 6.47-271 Bq.kg-1, N.D.-89.9 Bq.kg-1 and 16.8-1081 Bq.kg-1, respectively. The average radon exhalation rates and emanation coefficients were in the range of 0.0061-0.2404 Bq.kg-1.h-1 and 2.39-11.5%, respectively.
authors.affiliation: Department of Physics, Kyung-Pook National University, Sankuk-dong 1370, Taegu 702-701, Korea.
authors.forename: S C
authors.initials: SC
authors.lastname: Lee
authors.forename: C K
authors.initials: CK
authors.lastname: Kim
authors.forename: D M
authors.initials: DM
authors.lastname: Lee
authors.forename: H D
authors.initials: HD
authors.lastname: Kang
mesh_terms: D003252:Construction Materials / Q000009:adverse effects / Q000032:analysis*; D004603:Elements, Radioactive / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods / Q000592:standards / Q000706:statistics & numerical data*; D006801:Humans; D007723:Korea; D008422:Materials Testing / Q000379:methods; D008962:Models, Theoretical; D011868:Radioisotopes / Q000032:analysis*; D011886:Radon / Q000009:adverse effects / Q000032:analysis*; D018570:Risk Assessment; D012680:Sensitivity and Specificity; D013051:Spectrometry, Gamma
chemical_list: D004603:Elements, Radioactive; D011868:Radioisotopes; D011886:Radon