title: Natural radioactivity measurements of building materials in Baotou, China.
abstract: Natural radioactivity due to (226)Ra, (232)Th and (40)K in the common building materials collected from Baotou city of Inner Mongolia, China was measured using gamma-ray spectrometry. The radiation hazard of the studied building materials was estimated by the radium equivalent activity (Ra(eq)), internal hazard index (H(in)) and annual effective dose (AED). The concentrations of the natural radionuclides and Ra(eq) in the studied samples were compared with the corresponding results of other countries. The Ra(eq) values of the building materials are below the internationally accepted values (370 Bq kg(-1)). The values of H(in) in all studied building materials are less than unity. The AEDs of all measured building materials are at an acceptable level.
authors.affiliation: School of Tourism and Environment,  Shaanxi Normal University, Xi'an 710062,  People's Republic of China.
authors.forename: Caifeng
authors.initials: C
authors.lastname: Zhao
authors.forename: Xinwei
authors.initials: X
authors.lastname: Lu
authors.forename: Nan
authors.initials: N
authors.lastname: Li
authors.forename: Guang
authors.initials: G
authors.lastname: Yang
mesh_terms: D001417:Background Radiation; D001822:Body Burden; D002681:China; D003252:Construction Materials / Q000032:analysis*; D004781:Environmental Exposure / Q000032:analysis*; D011829:Radiation Dosage; D011868:Radioisotopes / Q000032:analysis*; D011874:Radiometry
chemical_list: D011868:Radioisotopes