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目的掌握上海市装饰装修用石材的放射性含量的现状。方法采用低本底γ能谱仪对石材样品中226Ra、232Th和40K含量进行测量。结果石材中的放射性含量以花岗岩最高,大理石次之,板石最低;同种石材中放射性含量也有较大差异。结论有必要对装饰装修用石材加强监管与控制。
Objective To grasp the status quo of radioactive content of decorative stone in Shanghai. Methods The content of 226Ra, 232Th and 40K in stone samples was measured by low background gamma spectrometer. The results of the radioactive stone content to granite highest, followed by marble, slate the lowest; the same kind of stone radioactive content is also quite different. Conclusion It is necessary to strengthen the supervision and control of decorative stone.