Ultrafast ring-opening fragmentation dynamics of C6H6 3+ induced by electron-impact ionization
Ultrafast ring-opening fragmentation dynamics of C6H6 3+ induced by electron-impact ionization
复制标题
电子轰击电离诱导的 C6H6 3 超快开环裂解动力学
DOI：
10.1103/physreva.104.032807
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发表时间：
2021
影响因子：
2.9
通讯作者：
Xueguang Ren
中科院分区：
文献类型：
--
作者：
Jiaqi Zhou;Yutian Li;Yingying Wang;Shaokui Jia;Xiaorui Xue;Tao Yang;Zhen Zhang;Alex;er Dorn;Xueguang Ren
The fragmentation dynamics of triply charged benzene [(C6H6 )3+] induced by 260 eV electron-impact ionization are investigated using a multiparticle coincidence momentum spectrometer. By measuring three fragment ions and one outgoing electron in quadruple coincidence, we identify the complete three-body dissociation channels of CH2+ + C2H3+ + C3H+, CH3+ + C2H2+ + C3H+, andC2H2+ + C2H2+ + C2H2+. We determine the projectile-energy-loss spectra, Dalitz plots, Newton diagrams, momentum correlation maps, and kinetic-energy release for each fragmentation channel. The analysis of these spectra is supported by an ab initio molecular dynamics simulation, which provides a molecular movie of the dissociation process. Our study reveals.sequential mechanisms for all three dissociation channels of (C6H6 )3+ trication, i.e., an ultrafast ring-opening reaction followed by two subsequent Coulomb-explosion processes.
