NATURAL RADIOACTIVITY MEASUREMENTS OF BUILDING MATERIALS IN BAOTOU, CHINA

摘要

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.