Fushitani Mizuho, Hikosaka Yasumasa, Tashiro Motomichi, Hishikawa Akiyoshi
Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan.
Institute of Liberal Arts and Sciences, University of Toyama, 2630 Sugitani, Toyama, Toyama 930-0194, Japan.
J Chem Phys. 2024 May 7;160(17). doi: 10.1063/5.0204769.
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.
利用磁瓶型电子能谱仪，通过多电子 - 离子符合光谱法研究了在hv = 100 eV的极紫外光照射下CH3I和CH2I2的解离双电离。对于I 4d芯孔态（I 4d3/2）-1和（I 4d5/2）-1的自旋 - 轨道态分辨俄歇电子能谱，明确了CH3I2 +和CH2I22 +的电子态。双电离后产生的主要离子种类与俄歇电子能量相关，表明根据俄歇衰变所填充的电子态，存在不同的碎片化途径。进行了理论计算，以理解双电荷态的碎片化以及俄歇衰变中观察到的自旋 - 轨道特异性。
