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The temperature dependence of adsorption coefficients of 222Rn on activated charcoal: an experimental study
Lu Guo1, Yunxiang Wang1, Lei Zhang2
1State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China.
Abstract:
The radon adsorption coefficient of activated charcoal (K) has exponential relationship with temperature theoretically, but few experiment results of K at temperature below 0 ℃ were given. In this study, K were measured using a flow-through system with activated charcoal in cylindrical adsorption beds at temperature adjusted from room temperature to -48°C using liquid nitrogen. Results are consistent with theory and show that the adsorption coefficient at -48°C is nearly 25 times higher than that at 23 ℃.
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