论文部分内容阅读
天然放射性核素U、Th、~(226)Ra、~(40)K及~3H广泛存在于自然界中。饮用水的含量一般很低,由于人类活动和科学发展,致使环境中天然放射性核素含量有所变化(分布不均)。环境中放射性污染及其对人的影响逐渐受到各国重视。为摸清内
Natural radionuclides U, Th, ~ (226) Ra, ~ (40) K and ~ 3H are widely found in nature. The level of potable water is generally low, resulting in changes (unevenly distributed) in the natural radionuclides in the environment due to human activities and scientific developments. Radioactive contamination in the environment and its impact on people are gradually receiving the attention of all countries. To find out