摘要
本文采用 2只扩散杯 ,一只选择渗透率较大的滤膜 ,使2 2 2 Rn和2 2 0 Rn能很容易的进入。另一只选择渗透率较小的滤膜 ,该滤膜只允许2 2 2 Rn进入 ,半衰期较短的2 2 0 Rn被阻挡在外面。通过不同滤膜扩散率的差异 ,改变探测器的空气交换率 ,从而达到同时测量2 2 2 Rn和2 2 0
A passive integrating dosimeter with two diffusion cups was applied for detecting 222 Rn and 220 Rn simultaneously. To let both nuclides enter in easily, one of the cups had membrane with higher permebility. However, the other cup with lower permeability membrane could only allow the entering of 222 Rn. Hence, 222 Rn and 220 Rn can be detected simultaneously by such dosimeters.
出处
《核技术》
CAS
CSCD
北大核心
2002年第7期555-558,共4页
Nuclear Techniques
