A theoretical study of radon diffusion in the lunar regolith

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dc.contributor.advisorHeymann, Dieteren_US
dc.creatorFriesen, Larry Jayen_US
dc.date.accessioned2016-04-22T21:59:07Zen_US
dc.date.available2016-04-22T21:59:07Zen_US
dc.date.issued1972en_US
dc.description.abstractAn investigation is made, via computer simulation, of the fate of radon gas produced in the lunar regolith by decay of uranium and thorium. The model used is that of radon atoms released and allowed to perform random walks within the lunar soil. Pressures based on results from Apollo lunar experiment packages indicate that the mean free path for such random walks will be the mean dimensions of void spaces within the soil rather than the (much longer) mean free path for collision with other gas molecules. Calculations are made, using various assumptions for mean void size, heat of adsorption of lunar material for radon, subsurface temperature profile, and depth of release, for the probability that a radon atom may escape through the regolith upper surface before it decays, to become part of the lunar "exosphere". Discussion is made of the implications such escape may have for lunar surface radioactivity and for lead/uranium dating of soil samples.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent65 ppen_US
dc.identifier.callnoThesis SP.SCI. 1972 Friesenen_US
dc.identifier.citationFriesen, Larry Jay. "A theoretical study of radon diffusion in the lunar regolith." (1972) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/89948">https://hdl.handle.net/1911/89948</a>.en_US
dc.identifier.digitalRICE0983en_US
dc.identifier.urihttps://hdl.handle.net/1911/89948en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleA theoretical study of radon diffusion in the lunar regolithen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentSpace Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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