Solar wind neon from genesis: Implications for the lunar noble gas record

Ansgar Grimberg, Heinrich Baur, Peter Bochsler, Fritz Bühler, Donald S. Burnett, Charles C. Hays, Veronika S. Heber, Amy Jurewicz, Rainer Wieler

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Abstract

Lunar soils have been thought to contain two solar noble gas components with distinct isotopic composition. One has been identified as implanted solar wind, the other as higher-energy solar particles. The latter was puzzling because its relative amounts were much too large compared with present-day fluxes, suggesting periodic, very high solar activity in the past. Here we show that the depth-dependent isotopic composition of neon in a metallic glass exposed on NASA's Genesis mission agrees with the expected depth profile for solar wind neon with uniform isotopic composition. Our results strongly indicate that no extra high-energy component is required and that the solar neon isotope composition of lunar samples can be explained as implantation-fractionated solar wind.

Original languageEnglish (US)
Pages (from-to)1133-1135
Number of pages3
JournalScience
Volume314
Issue number5802
DOIs
StatePublished - Nov 17 2006

ASJC Scopus subject areas

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    Grimberg, A., Baur, H., Bochsler, P., Bühler, F., Burnett, D. S., Hays, C. C., Heber, V. S., Jurewicz, A., & Wieler, R. (2006). Solar wind neon from genesis: Implications for the lunar noble gas record. Science, 314(5802), 1133-1135. https://doi.org/10.1126/science.1133568