摘要
采用一般的放射性测量仪器 ,通过测定雨水中的γ射线 ,对雨水中的短寿命放射性核素进行了研究。实验证明 ,几乎所有的降雨都存在短寿命放射性核素。能谱分析结果表明 :这些短寿命放射性核素主要为2 18Po、2 14 Pb和2 14 Bi。对雨水天然放射性的产生机理进行了分析和探讨 ,认为水汽凝结、下降雨滴的碰并和对空气的冲刷是雨水放射性产生的原因。探讨了雨水的放射性对地面γ测量、2 10 Po法测量等放射性找矿方法的影响。
The short-lived radioactive nuclide in rainwater were measured using general radioactive measurement instrument and studied in this paper. The experimental results indicate that there are short-lived radioactive nuclides in all kinds of rainwater. The result of gamma ray spectrum analysis shows that these short-lived radioactive nuclides are 218 Po, 214 Pb, 214 Bi and so on. The entry mechanism of these radioactive nuclides into rainwater are discussed. These radioactive nuclides enter rainwater during the course of vapor condenration and raindrop incorporating and scouring the air. These radioactive nuclides in rainwater have an effect on the radioactivity measurement such as ground gamma measurement, 210 Po measurement and so on.
出处
《核技术》
CAS
CSCD
北大核心
2001年第6期503-508,共6页
Nuclear Techniques
