Behaviour of 222Rnat cryogenic temperatures

Behaviour of 222Rnat cryogenic temperatures
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222Rnat 低温行为

DOI:
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
G. Zuzel
G. Zuzel
中科院分区:
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文献类型:
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作者:
S. Lindemann;H. Simgen;G. Zuzel

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在低温环境中,氡的行为仍然不是很清楚。因此,在室温下测得的氡射率不能直接转换到低温条件下。在这项工作中,我们介绍了一种桌面实验,它提供了一种直接测定222Rn在液氮温度下在低温Ar和He中的行为的方法。我们观察到222个Rn原子对液态Ar的发射速率比室温下观测到的对氦的发射速率高。我们还发现,222Rn原子在液态Ar温度下发射到氦时附着在冷金属表面,但在发射到低温Ar时部分分布在液体中。最后,我们对观察结果给出了可能的解释。
The behaviour of radon in a cryogenic environment is still not well known. Therefore, measured radon emanation rates at room temperature cannot be translated directly to cryogenic conditions. In this work we present a table‐top experiment that provides a direct way of determining the behaviour of 222 Rn in cryogenic argon and helium at liquid argon temperature. We observe an increased emanation rate of 222 Rn atoms to liquid argon compared to the rate observed to helium at room temperature. We also find that 222 Rn atoms stick to cold metal surfaces when emanated to helium at liquid argon temperature but partly distribute in the liquid when emanated to cryogenic argon. Concluding, we give possible interpretations of the observations.