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dc.contributor.authorJones, Brant M.
dc.contributor.authorAleksandrov, Aleksandr
dc.contributor.authorHibbitts, Charles
dc.contributor.authorOrlando, Thomas M.
dc.date.accessioned2021-07-01T14:56:55Z
dc.date.available2021-07-01T14:56:55Z
dc.date.issued2021
dc.identifier.urihttp://hdl.handle.net/1853/64896
dc.descriptionData for paper submitted to Earth and Planetary Science Letters - title of the data file corresponds to the data presented in the respective figure in the manuscript.en_US
dc.description.abstractThe evolution of water and molecular hydrogen from Apollo lunar sample 15221, a mature mare soil, was examined by temperature program desorption (TPD) experiments conducted under ultra-high vacuum conditions. Desorption at the grain/vacuum interface with re-adsorption as water transports though the void space of the grains and activated sub-surface diffusion were found to reproduce the experimental TPD signal. Signal from the grain/vacuum interface yielded the second order desorption activation energies and site probability distributions. Water from sample 15221 exhibited a broad distribution of activation energies peaking at 130 kJ mol-1 extending up to 350 kJ mol-1 at zero coverage limit with an onset of 110 kJ mol-1 at full coverage. Our results suggest that water and hydrogen originating from lunar regolith contributes a minor amount to the observed mass in the LCROSS impact event. The abnormal amount of molecular hydrogen observed in the ejecta plume of the LCROSS impact may indicate that the radiolytic production of H2 from electron and galatic cosmic rays of physisorbed water is a contributor to the vast quantity of molecular hydrogen detected.en_US
dc.description.sponsorshipNASA Solar System Exploration Research Virtual Institute (SSERVI) under cooperative agreement numbers NNA17BF68A (REVEALS) and NNA14AB02A (VORTICES)en_US
dc.publisherGeorgia Institute of Technology
dc.subjectTemperature program desorptionen_US
dc.subjectLunar Regolithen_US
dc.subjectWater formationen_US
dc.subjectSolar winden_US
dc.titleThermal Evolution of Water and Hydrogen from Apollo Lunar Regolith - Data Filesen_US
dc.typeDataseten_US
dc.contributor.corporatenameGeorgia Institute of Technology. School of Chemistry and Biochemistry
dc.contributor.corporatenameNASA Solar System Exploration Research Virtual Institute


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