| 摘要 |
<p>A method of and apparatus for measuring radon concentration in air involving the provision of a detector containing an adsorbent (14) of radon and a desiccant (12). The desiccant can selectively retain an amount of water weighing from about 25% to about 50% of the weight of the adsorbent (14). The detector is exposed to a finite air space to be measured for a predetermined time period. The radon is liberated from the adsorbent so that the alpha particles and beta particles, which are the signature of radon radioactivity, are counted by liquid scintillation technique. The air may be pumped through the apparatus to hasten the radon adsorption process.</p> |
