Depth-dependent fractionation of light solar wind noble gases in a Genesis target
METEORITICS & PLANETARY SCIENCE(2006)
摘要
We analyzed light noble gases in a bulk metallic glass (BMG) that was
exposed to solar wind (SW) irradiation on Genesis for its total exposure time
and all SW regimes [1]. The BMG was especially designed to look for a
putative solar energetic particle (SEP) component, reported to be present in
lunar soils [2], by using the closed system stepwise etching (CSSE)
technique. Here we present the depth distribution of He and Ne isotopes and
discuss different processes leading to the observed fractionation patterns.
Moreover, this will be compared with measurements of Ar isotopes that are
actually in progress.
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关键词
solar wind,noble gases
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