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Step-by-step state-selective tracking of fragmentation dynamics of water dications by momentum imaging

Author

Listed:
  • Travis Severt

    (Kansas State University)

  • Zachary L. Streeter

    (Lawrence Berkeley National Laboratory
    University of California)

  • Wael Iskandar

    (Lawrence Berkeley National Laboratory)

  • Kirk A. Larsen

    (Lawrence Berkeley National Laboratory
    University of California)

  • Averell Gatton

    (Lawrence Berkeley National Laboratory
    Auburn University)

  • Daniel Trabert

    (Goethe-Universität)

  • Bethany Jochim

    (Kansas State University)

  • Brandon Griffin

    (Lawrence Berkeley National Laboratory
    University of Nevada Reno)

  • Elio G. Champenois

    (Lawrence Berkeley National Laboratory
    University of California)

  • Matthew M. Brister

    (Lawrence Berkeley National Laboratory)

  • Dylan Reedy

    (University of Nevada Reno)

  • Demitri Call

    (University of Nevada Reno)

  • Richard Strom

    (Lawrence Berkeley National Laboratory
    Auburn University)

  • Allen L. Landers

    (Auburn University)

  • Reinhard Dörner

    (Goethe-Universität)

  • Joshua B. Williams

    (University of Nevada Reno)

  • Daniel S. Slaughter

    (Lawrence Berkeley National Laboratory)

  • Robert R. Lucchese

    (Lawrence Berkeley National Laboratory)

  • Thorsten Weber

    (Lawrence Berkeley National Laboratory)

  • C. William McCurdy

    (Lawrence Berkeley National Laboratory
    University of California)

  • Itzik Ben-Itzhak

    (Kansas State University)

Abstract

The double photoionization of a molecule by one photon ejects two electrons and typically creates an unstable dication. Observing the subsequent fragmentation products in coincidence can reveal a surprisingly detailed picture of the dynamics. Determining the time evolution and quantum mechanical states involved leads to deeper understanding of molecular dynamics. Here in a combined experimental and theoretical study, we unambiguously separate the sequential breakup via D+ + OD+ intermediates, from other processes leading to the same D+ + D+ + O final products of double ionization of water by a single photon. Moreover, we experimentally identify, separate, and follow step by step, two pathways involving the b 1Σ+ and a 1Δ electronic states of the intermediate OD+ ion. Our classical trajectory calculations on the relevant potential energy surfaces reproduce well the measured data and, combined with the experiment, enable the determination of the internal energy and angular momentum distribution of the OD+ intermediate.

Suggested Citation

  • Travis Severt & Zachary L. Streeter & Wael Iskandar & Kirk A. Larsen & Averell Gatton & Daniel Trabert & Bethany Jochim & Brandon Griffin & Elio G. Champenois & Matthew M. Brister & Dylan Reedy & Demi, 2022. "Step-by-step state-selective tracking of fragmentation dynamics of water dications by momentum imaging," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32836-6
    DOI: 10.1038/s41467-022-32836-6
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    References listed on IDEAS

    as
    1. T. Weber & A. O. Czasch & O. Jagutzki & A. K. Müller & V. Mergel & A. Kheifets & E. Rotenberg & G. Meigs & M. H. Prior & S. Daveau & A. Landers & C. L. Cocke & T. Osipov & R. Díez Muiño & H. Schmidt-B, 2004. "Complete photo-fragmentation of the deuterium molecule," Nature, Nature, vol. 431(7007), pages 437-440, September.
    2. R. Guillemin & P. Decleva & M. Stener & C. Bomme & T. Marin & L. Journel & T. Marchenko & R. K. Kushawaha & K. Jänkälä & N. Trcera & K. P. Bowen & D. W. Lindle & M. N. Piancastelli & M. Simon, 2015. "Selecting core-hole localization or delocalization in CS2 by photofragmentation dynamics," Nature Communications, Nature, vol. 6(1), pages 1-6, May.
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