A1 Refereed original research article in a scientific journal
Distinguishing the XUV-induced Coulomb explosion dynamics of iodobenzene using covariance analysis
Authors: Walmsley, Tiffany; Allum, Felix; Harries, James R; Kumagai, Yoshiaki; Lim, Suzanne; McManus, Joseph; Nagaya, Kiyonobu; Britton, Mathew; Brouard, Mark; Bucksbaum, Philip; Fushitani, Mizuho; Gabalski, Ian; Gejo, Tatsuo; Hockett, Paul; Howard, Andrew J; Iwayama, Hiroshi; Kukk, Edwin; Lam, Chow-shing; Minns, Russell S; Niozu, Akinobu; Nishimuro, Sekito; Niskanen, Johannes; Owada, Shigeki; Razmus, Weronika O; Rolles, Daniel; Somper, James; Ueda, Kiyoshi; Unwin, James; Wada, Shin-ichi; Woodhouse, Joanne L; Forbes, Ruaridh; Burt, Michael; Warne, Emily M
Publisher: IOP Publishing
Publication year: 2024
Journal: Journal of Physics B: Atomic, Molecular and Optical Physics
Journal name in source: Journal of Physics B: Atomic, Molecular and Optical Physics
Article number: 235101
Volume: 57
Issue: 23
ISSN: 0953-4075
eISSN: 1361-6455
DOI: https://doi.org/10.1088/1361-6455/ad8799
Web address : http://doi.org/10.1088/1361-6455/ad8799
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/459261146
The primary and secondary fragmentation dynamics of iodobenzene following its ionization at 120 eV were determined using three-dimensional velocity map imaging and covariance analysis. Site-selective iodine 4d ionization was used to populate a range of excited polycationic parent states, which primarily broke apart at the carbon-iodine bond to produce I+ with phenyl or phenyl-like cations (CnHx+ or CnHx2+, with n = 1 – 6 and x = 1 – 5). The molecular products were produced with varying degrees of internal excitation and dehydrogenation, leading to stable and unstable outcomes. This further allowed the secondary dynamics of C6Hx2+ intermediates to be distinguished using native-frame covariance analysis, which isolated these processes in their own centre-of-mass reference frames. The mass resolution of the imaging mass spectrometer used for these measurements enabled the primary and secondary reaction channels to be specified at the level of individual hydrogen atoms, demonstrating the ability of covariance analysis to comprehensively measure the competing fragmentation channels of aryl cations, including those involving intermediate steps.
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Funding information in the publication:
Research funded by Engineering and Physical Sciences Research Council (EP/R010609/1) | Research Council of Finland (331234) | Japan Society for the Promotion of Science (20K05549) | Leverhulme Trust (RPG-2021-257) | Basic Energy Sciences (DE-AC02-76SF00515)
