摘要
文章介绍了用NaI(Tl)晶体探测器对大体积水中的γ弱放射性直接快速在线测量的方法,并用^(40)K液体源和点源(^(60)Co,^(137)Cs)进行了效率刻度。可行性研究表明,对φ100×100mm的NaI(Tl)晶体探测器,监测水池的容积在1m^3左右是可取的。监测装置的最小可探测的放射性比活度可望好于9.2×10~2Bq/m^3。实际监测中,还要对工业下水进行鼓泡赶氡。
The paper presents a method for on-line measurement of low-level γ radioactivity in large-volume effleunt water. The detection effeciency for liquid source of ^(40)K and point sources (^(60)Co, ^(137)Cs) are determined. Feasibility study shows that a volume about 1 m^3 of monitoring pool for φ 100×100 mm NaI (T1) detector is acceptable. The minimum specific activity that can be detected would be better than 9.2×10~2 Bq/m^3. It looks necessary to bubble out the radon gas in industrial. effleunt before the measurement.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1989年第1期20-25,共6页
Atomic Energy Science and Technology
关键词
晶体探测器
在线测量
监测
水
污水
NaI (T1) detector
On-line rapid measurement
Monitoring of industrial effleunt
Measurement for large-volume water
