【摘要】 应用γ能谱仪和最小二乘法解析谱方法，研究了３１种地板砖中放射性核素的含量，发现不同地板砖中Ｕ、Ｔｈ、Ｒａ和４０Ｋ的放射性含量有较大的差别，少数产品的含量甚至超出了国家规定的建材放射卫生防护标准更多还原

【Abstract】 Radionuclides in 31 pieces of ground bricks from different sources were determined by using the γ spectrometry. The spectra were resolved by the least square method. The contents of U, Th, Ra and 40K in them spread in a wide range. Values of some bricks products were above the limits of the state standard for radiahazards in building meterials.更多还原