岩石、矿物和自然环境中天然放射性剂量研究

The Dose Study on Natural Radioactivity in the Rocks,Materials and Environment

采用北京核仪器厂生产的FJ-428型便携式多用辐射仪测定不同矿物、岩石以及湖南岳麓山、望城县桥驿洪家水库休闲度假区、西藏勒布旅游区等不同地质环境的放射性,表明高温高压下形成的矿物和岩石以及高温高压作用下形成的变质岩放射性剂量高,而沉积岩类和沉积类矿物放射性剂量低.不同矿物、岩石的α射线放射性剂量极低,放射性污染最主要的是γ射线污染.对放射性剂量高的矿物、岩石如花岗岩、板岩在一般情况下不适宜作室内建筑或装饰用材.

With the implementation of the portable multi-use radiometrie FJ-428 produced by Beijing Research Laboratory production of nuclear, we examine the radiation of different minerals, rocks and different geological environment in Yuelu Mountain,Vacation Area at Hongjia Reservoir in Qiaoyi Town in Wanehen County, Hunan and Lebu Tourist Area in Tibet. We find that minerals and rocks formed under high temperature and pressure have a relatively higher radiation dose, so do the metamorphic rocks formed under the influence of high temperature and pressure. While, sedimentary rocks and materials has a relatively lower radioactivity. The radioactive level of building materials, decorative materials and the natural environment has much to do with the raw and processed materials. The α - ray is very low in different minerals, rocks and the most important radioactive pollution comes from γ - ray. In the end of this thesis, it is suggested that manerials, rocks such as granite and slate should not be used as constructive and decorative materials inside room for their potential high radioactivity.