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Coulomb-explosion imaging of concurrent CH2 BrI photodissociation dynamics

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  • Michael Burt, University of Oxford, Oxford
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  • Rebecca Boll, DESY Photon Science
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  • Jason W.L. Lee, University of Oxford, Oxford
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  • Kasra Amini, University of Oxford, Oxford
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  • Hansjochen Köckert, University of Oxford, Oxford
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  • Claire Vallance, University of Oxford, Oxford
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  • Alexander S. Gentleman, University of Oxford, Oxford
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  • Stuart R. Mackenzie, University of Oxford, Oxford
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  • Sadia Bari, DESY Photon Science
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  • Cédric Bomme, DESY Photon Science
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  • Stefan Düsterer, DESY Photon Science
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  • Benjamin Erk, DESY Photon Science
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  • Bastian Manschwetus, DESY Photon Science
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  • Erland Müller, DESY Photon Science
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  • Dimitrios Rompotis, DESY Photon Science
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  • Evgeny Savelyev, DESY Photon Science
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  • Nora Schirmel, DESY Photon Science
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  • Simone Techert, DESY Photon Science, Max Planck Institute for Biophysical Chemistry (Karl Friedrich Bonhoeffer Institute), University of Göttingen
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  • Rolf Treusch, DESY Photon Science
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  • Jochen Küpper, DESY Photon Science, Universitat Hamburg
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  • Sebastian Trippel, DESY Photon Science, Universitat Hamburg
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  • Joss Wiese, DESY Photon Science
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  • Henrik Stapelfeldt
  • Barbara Cunha De Miranda, LOCEAN Laboratory
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  • Renaud Guillemin, LOCEAN Laboratory
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  • Iyas Ismail, LOCEAN Laboratory
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  • Loïc Journel, LOCEAN Laboratory
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  • Tatiana Marchenko, LOCEAN Laboratory
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  • Jérôme Palaudoux, LOCEAN Laboratory
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  • Francis Penent, LOCEAN Laboratory
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  • Maria Novella Piancastelli, LOCEAN Laboratory, Uppsala universitet
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  • Marc Simon, LOCEAN Laboratory
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  • Oksana Travnikova, LOCEAN Laboratory
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  • Felix Brausse, Max Born Institute, 12489 Berlin
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  • Gildas Goldsztejn, Max Born Institute, 12489 Berlin
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  • Arnaud Rouzée, Max Born Institute, 12489 Berlin
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  • Marie Géléoc, Université Paris-Saclay
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  • Romain Geneaux, Université Paris-Saclay
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  • Thierry Ruchon, Université Paris-Saclay
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  • Jonathan Underwood, UCL
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  • David M.P. Holland, Daresbury Laboratory
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  • Andrey S. Mereshchenko, Saint Petersburg State University
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  • Pavel K. Olshin, Saint Petersburg State University
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  • Per Johnsson, Lunds Universitet
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  • Sylvain Maclot, Lunds Universitet
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  • Jan Lahl, Lunds Universitet
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  • Artem Rudenko, Kansas State University
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  • Farzaneh Ziaee, Kansas State University
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  • Mark Brouard, University of Oxford, Oxford
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  • Daniel Rolles, Kansas State University

The dynamics following laser-induced molecular photodissociation of gas-phase CH2BrI at 271.6 nm were investigated by time-resolved Coulomb-explosion imaging using intense near-IR femtosecond laser pulses. The observed delay-dependent photofragment momenta reveal that CH2BrI undergoes C-I cleavage, depositing 65.6% of the available energy into internal product states, and that absorption of a second UV photon breaks the C-Br bond of CH2Br. Simulations confirm that this mechanism is consistent with previous data recorded at 248 nm, demonstrating the sensitivity of Coulomb-explosion imaging as a real-time probe of chemical dynamics.

Original languageEnglish
Article number043415
JournalPhysical Review A
Volume96
Issue4
ISSN2469-9926
DOIs
Publication statusPublished - 17 Oct 2017

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