Steady Sources of Hydrogen at the Lunar Poles and Implications for Observables

Details Steady Sources of Hydrogen at the Lunar Poles and Implications for Observables Steady Sources of Hydrogen at the Lunar Poles and Implications for Observables

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm...p22a02c&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #P22A-02

Physics

5405 Atmospheres--Composition And Chemistry, 5415 Erosion And Weathering, 6250 Moon (1221)

Scientific paper

We model the migration of volatiles to the lunar poles and the retention of those volatiles at the lunar cold traps. The source of the volatiles used in the model is the steady release and migration of solar wind implanted hydrogen by physical and chemical sputtering, by diffusion, and by vaporization from micrometeoroid bombardment. The particles migrate through the lunar exosphere using a Monte Carlo model. Those particles that reach the permanently shaded areas before escaping the model by thermal escape or photoremoval stick to the top layer of the cold trap. Space weathering processes and interstellar UV radiation are then considered to determine how the volatiles are retained at the cold traps and how the concentration should vary with depth. Finally, we discuss the predictions made by the model for several observable parameters, e.g., exospheric column abundances and solar wind pickup ions.

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