Europa's surface composition and sputter‐produced ionosphere
Europa's surface composition and sputter‐produced ionosphere
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木卫二的表面成分和溅射产生的电离层
DOI：
10.1029/98gl02565
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发表时间：
1998
影响因子：
5.2
通讯作者：
W. Lewis
中科院分区：
文献类型：
--
作者：
R. Johnson;R. Killen;J. Waite;W. Lewis
木卫二的风化层被高能带电粒子有效地溅射和分解，产生了代表其表面成分的大气。除了O2和H2从冰的分解，我们表明，代表有机物和盐的分子将以离子形式存在，使用离子质谱仪在轨道航天器上检测到的水平。这种仪器也可以测量同位素比率来确定表面年龄。
The efficient sputtering and decomposition of Europa's regolith by energetic charged particles produces an atmosphere representative of its surface composition. In addition to O2 and H2 from the decomposition of ice, we show that molecules representative of organics and salts will be present in ionic form at levels detectable using an ion mass spectrometer on an orbiting spacecraft. Such an instrument can also measure isotope ratios to determine surface age.