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首页> 外文期刊>The European physical journal, D. Atomic, molecular, and optical physics >Electron impact ionization and cationic fragmentation of the pyridazine molecules
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Electron impact ionization and cationic fragmentation of the pyridazine molecules

机译:电子冲击电离和哒嗪分子的阳离子碎片

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摘要

Electron impact mass spectroscopy was used to investigate ionization and cationic fragmentation of the pyridazine (1,2 diazine), C4H4N2, molecules in the gas phase. The mass spectra were measured and the observed mass peaks assigned to the corresponding cations. The appearance energies of most of the cationic fragments were determined and the possible fragmentation processes are discussed. The total cross section for electron impact ionization of pyridazine was calculated using the binary-encounter-Bethe (BEB) model. The calculated cross section was applied to normalize the measured cation yield curves and total and partial cross sections for ionization and cationic fragmentation were obtained over the energy range from the respective ionization thresholds to 140 eV.
机译:用于研究哒嗪(1,2二嗪),C4H4N2,气相分子的离子化和阳离子分段来研究电子冲击质谱。 测量质谱和分配给相应阳离子的观察到的质量峰。 确定了大多数阳离子片段的外观能量,并且讨论了可能的碎片过程。 使用二进制 - 遭遇-BETHE(BEB)模型计算哒嗪电子碰撞电离的总横截面。 施加计算的横截面以使测量的阳离子产量曲线和离子化的总和部分横截面从相应的电离阈值到140eV的电离阈值获得电离和阳离子碎片。

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