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Journal Article

Ultrafast ring-opening fragmentation dynamics of C6H63+ induced by electron-impact ionization

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Dorn,  Alexander
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Ren,  Xueguang
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Citation

Zhou, J., Li, Y., Wang, Y., Jia, S., Xue, X., Yang, T., et al. (2021). Ultrafast ring-opening fragmentation dynamics of C6H63+ induced by electron-impact ionization. Physical Review A, 104(3): 032807. doi:10.1103/PhysRevA.104.032807.


Cite as: https://hdl.handle.net/21.11116/0000-000A-3CB9-3
Abstract
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+, and C2H2+ + 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.