O atom production in water ice: Implications for O2 formation on icy satellites

被引：7

作者：

Cooper, Paul D. ^{[1
]}

Moore, Marla H. ^{[2
]}

Hudson, Reggie L. ^{[2
]}

机构：

[1] George Mason Univ, Dept Chem & Biochem, Fairfax, VA 22030 USA

[2] NASA, Goddard Space Flight Ctr, Astrochem Branch, Greenbelt, MD 20771 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS | 2010年 / 115卷

关键词：

OXIDANTS; GANYMEDE; SPECTRA;

D O I：

10.1029/2009JE003563

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We have found that O atoms are a primary product in the irradiation of water-ice with 0.8 MeV protons. This observation has implications in understanding the chemical reactions that occur to produce molecular oxygen (O-2) in such laboratory ices, as well as ices found on the surfaces of Ganymede and Europa, and the ice particles present in Saturn's rings. We estimate that in irradiated water-ice, O-2 can be formed at a lower limit of 0.07% by number relative to water and is in agreement with observations of the icy Jovian satellites.

引用

页数：6

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