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The Escape Probability of Some Ions from Mars and Titan Ionospheres

机译：来自火星和泰坦电离层的一些离子的逃逸概率

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The Kinetic Energy Release (KER) for various ionic species coming from two-body dissociations reactions, induced by double photoionization of CO_2, C_2H_2 and N_2O neutral precursors of interest in planetary atmospheres, are reported. The KER distributions as a function of the VUV photon energy in the range of 30-65 eV are extracted from the coincidences spectra obtained by using tunable synchrotron radiation and electron-ion-ion coincidences coupled with ion imaging techniques. This experimental method, coupled with a computational analysis of the data based on a Monte Carlo trajectoriy simulation, allows to discuss about the probability for some ionic species to escape the upper atmosphere of Mars and Titan. In fact, the KER measured for H~+, C~+, CH~+, CH_2~+, N~+, O~+ and CO~+ fragment ions are ranging between 1.0 and 6.0 eV, and these translational energy contents are large enough to allow these ionic species in participating in the atmospheric escape from Mars and Titan into space.
机译：据报道，来自双体分离反应的各种离子物质的动能释放（KER），通过双面光相诱导的CO_2，C_2H_2和N_2O中性前体的行星大气压诱导。作为通过使用可调谐同步辐射和与离子成像技术耦合的可调谐同步辐射和电子离子离子重合而获得的偶欣光谱作为Vuv光子能量的函数的ker分布。这种实验方法与基于蒙特卡罗轨迹仿真的数据的计算分析相结合，允许讨论一些离子物种的概率，以逃避火星和泰坦的上层大气。实际上，测量的H〜+，C〜+，CH〜+，CH_2〜+，N +，O +和CO〜+片段离子的KER在1.0和6.0eV之间的范围内，并且这些翻译能源内容是足够大以允许这些离子物种参与从火星和泰坦进入太空的大气逃脱。

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