期刊
ICARUS
卷 255, 期 -, 页码 24-29出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.icarus.2014.09.049
关键词
Ices; Moon; Regoliths; Moon, surface
资金
- NASA LASER [NNX11AP13G]
- NLSI [NNA09DB34A]
- NASA [NNX11AP13G, 139722] Funding Source: Federal RePORTER
The desorption activation energies for water molecules chemisorbed on Apollo lunar samples 72501 (highlands soil) and 12001 (mare soil) were determined by temperature programmed desorption experiments in ultra-high vacuum. A significant difference in both the energies and abundance of chemisorption sites was observed, with 72501 retaining up to 40 times more water (by mass) and with much stronger adsorption interactions, possibly approaching 1.5 eV. The dramatic difference between the samples may be due to differences in mineralogy and surface exposure age. The distribution function of water desorption activation energies for sample 72501 was used as an initial condition to simulate water persistence through a temperature profile matching the lunar day. (c) 2014 Elsevier Inc. All rights reserved.
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