气候变化领域集成服务门户(CCPortal): Thermal evolution of water and hydrogen from Apollo lunar regolith grains

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DOI	10.1016/j.epsl.2021.117107
	Thermal evolution of water and hydrogen from Apollo lunar regolith grains
	Jones B.M.; Aleksandrov A.; Hibbitts C.A.; Orlando T.M.
发表日期	2021
ISSN	0012821X
卷号	571
英文摘要	The 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. © 2021 Elsevier B.V.
关键词	activation energies hydrogen lunar regolith recombinative desorption volatiles water
英文关键词	Cosmology; Desorption; Hydrogen production; Lunar surface analysis; Probability distributions; Water; Energy; Lunar regolith; Lunar samples; Molecular hydrogen; Recombinative desorption; Temperature programme; Thermal evolution; Ultra-high; Vacuum interfaces; Volatile; Activation energy; Parnassius apollo
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203155
作者单位	School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, United States; Center for Space Technology and Research, Georgia Institute of Technology, Atlanta, GA, United States; John Hopkins, Applied Physics Laboratory, Laurel, MD, United States; School of Physics, Georgia Institute of Technology, Atlanta, GA, United States
推荐引用方式 GB/T 7714	Jones B.M.,Aleksandrov A.,Hibbitts C.A.,et al. Thermal evolution of water and hydrogen from Apollo lunar regolith grains[J],2021,571.
APA	Jones B.M.,Aleksandrov A.,Hibbitts C.A.,&Orlando T.M..(2021).Thermal evolution of water and hydrogen from Apollo lunar regolith grains.Earth and Planetary Science Letters,571.
MLA	Jones B.M.,et al."Thermal evolution of water and hydrogen from Apollo lunar regolith grains".Earth and Planetary Science Letters 571(2021).