首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Ionization and fragmentation of methane induced by 40 eV to 480 eV synchrotron radiation: From valence to beyond core electron ionization
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Ionization and fragmentation of methane induced by 40 eV to 480 eV synchrotron radiation: From valence to beyond core electron ionization

机译:40 eV至480 eV同步加速器辐射诱发的甲烷电离和碎片化:从价电子到核心电子电离

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Photoionization and fragmentation of gaseous methane induced by tunable synchrotron radiation were investigated in a wide energy range, from 40 eV up to 480 eV. We report electron-ion coincidence experiments by measuring the relative partial-ion yields and precursor-specific relative yields for individual fragment ions and for ion fragment pairs as a function of photon energy. The fragmentation patterns are discussed with emphasis on the transition behavior of the bond breaking reactions and of the hydrogen rearrangements from valence to core electron ionization. Below the C 1s threshold, a comparison between photon induced dissociation and electron impact data showed that the ionic fragments formation depends for both projectiles on the same final electronic state reached upon ionization.
机译:在从40 eV到480 eV的宽能量范围内,研究了可调谐同步加速器辐射引起的气态甲烷的光电离和裂解。我们通过测量单个碎片离子和离子碎片对的相对部分离子产率和前体特定的相对产率来报告电子离子符合实验,这些结果是光子能量的函数。讨论了碎裂模式,重点是键断裂反应的过渡行为以及氢从价键到核心电子电离的重排。低于C 1s阈值,光子诱导的解离和电子撞击数据之间的比较表明,离子碎片的形成取决于两个弹丸,它们取决于电离时达到的最终电子状态。

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