The dissociative double ionization of CH3I and CH2I2 irradiated with extreme ultraviolet light at hv = 100 eV is investigated by multi-electron–ion coincidence spectroscopy using a magnetic bottle type electron spectrometer. The spin–orbit state-resolved Auger electron spectra for the I 4d core-hole states, (I 4d3/2)−1 and (I 4d5/2)−1, provide clear identifications of electronic states of CH3I2+ and CH2I22+. The dominant ion species produced after the double ionization correlate with the Auger electron energy, showing that different fragmentation pathways are open depending on the electronic states populated by the Auger decay. Theoretical calculations are performed to understand the fragmentation from the doubly charged states and the observed spin–orbit specificity in the Auger decay.

中文翻译：

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通过多电子离子符合光谱研究 CH3I 和 CH2I2 通过 I 4d 核空穴态的状态选择性解离双电离

使用磁瓶型电子能谱仪通过多电子离子符合光谱研究了 hv = 100 eV 的极紫外光照射下 CH3I 和 CH2I2 的解离双电离。 I 4d 核空穴态 (I 4d3/2)−1 和 (I 4d5/2)−1 的自旋轨道态分辨俄歇电子能谱提供了 CH3I2+ 和 CH2I22+ 电子态的清晰识别。双电离后产生的主要离子种类与俄歇电子能量相关，表明不同的碎片路径是开放的，具体取决于俄歇衰变所填充的电子态。进行理论计算是为了了解双电荷态的碎片以及观察到的俄歇衰变中的自旋轨道特异性。