白银市建筑材料放射性水平测定王海林赵银萍（甘肃省白银市卫生防疫站，白银市７３０９００）建筑材料中的天然放射性主要来源于铀系，钍系和天然钾。它们是构成室内γ辐射场的主要因素，铀系还是室内空气中氡的主要来源。建筑材料的放射卫生监测是放射卫生综合监督管理的... Determination of Radioactive Levels of Building Materials in Baiyin Wang Hailin Zhao Yinping (Health and Anti-Epidemic Station, Baiyin City, Gansu Province, Baiyin 730900) The natural radioactivity in building materials mainly comes from uranium, thorium and natural potassium. They are the main contributors to the indoor gamma radiation field, and uranium is the main source of radon in indoor air. Radiological monitoring of building materials is comprehensive supervision and administration of radiation ...