Temporal Variations of 222Rn Density Distributions in the Lunar Exosphere

Ian Lin Lai, Wing Huen Ip

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Because of radiogenic processes, the lunar interior is a source of rare gases like helium (4He), argon (40Ar), and radon (222Rn) that might be released continuously, or impulsively during moonquakes. The detection of radon is therefore important in the sense that it can help trace the crustal dynamics on the Moon. In this study, we will introduce a Monte Carlo-based model designed to investigate the time-dependent transient dynamics of the lunar 222Rn exosphere. Our model accounts for the background emission and transient ejection of gas molecules from the lunar surface, encompassing loss processes such as radioactive decay, photoionization, and the cold trapping in permanently shadowed regions near the poles. Additionally, it incorporates the diurnal temperature fluctuations of the lunar surface, which significantly influence the condensation duration of the radon atoms and their subsequent release near the sunrise. This model also can support future observations in missions such as Chang’E 6 or other lunar explorations.

原文???core.languages.en_GB???
文章編號185
期刊Planetary Science Journal
5
發行號8
DOIs
出版狀態已出版 - 1 8月 2024

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