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Solar Ion Processing of Major Element Surface Compositions of Mature Mare Soils: Insights from Combined XPS and Analytical TEM Observations
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Author and Affiliation:
Christoffersen, R.(Jacobs Technology, Inc., Houston, TX, United States);
Dukes, C.(Virginia Univ., Lab for Atomic and Surface Physics, Charlottesville, VA, United States);
Keller, L. P.(NASA Johnson Space Center, Houston, TX, United States);
Baragiola, R.(Virginia Univ., Lab for Atomic and Surface Physics, Charlottesville, VA, United States)
Abstract: Solar wind ions are capable of altering the sur-face chemistry of the lunar regolith by a number of mechanisms including preferential sputtering, radiation-enhanced diffusion and sputter erosion of space weathered surfaces containing pre-existing compositional profiles. We have previously reported in-situ ion irradiation experiments supported by X-ray photoelectron spectroscopy (XPS) and analytical TEM that show how solar ions potentially drive Fe and Ti reduction at the monolayer scale as well as the 10-100 nm depth scale in lunar soils [1]. Here we report experimental data on the effect of ion irradiation on the major element surface composition in a mature mare soil.
Publication Date: Aug 12, 2012
Document ID:
20120015815
(Acquired Nov 21, 2012)
Subject Category: LUNAR AND PLANETARY SCIENCE AND EXPLORATION
Report/Patent Number: JSC-CN-26544
Document Type: Conference Paper
Meeting Information: 75th Annual Meeting of the Meteoritical Society; 12-17 Aug. 2012; Caims; Australia
Meeting Sponsor: Meteoritical Society; Piscataway, NJ, United States
Financial Sponsor: NASA Johnson Space Center; Houston, TX, United States
Organization Source: NASA Johnson Space Center; Houston, TX, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: EROSION; ION IRRADIATION; LUNAR ROCKS; SOILS; SOLAR WIND; SPACE WEATHERING; SPUTTERING; SURFACE LAYERS; X RAY SPECTROSCOPY
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