Employing Resonance-Enhanced Multi-Photon Dissociation for measuring the dissociation energy of LiO$^{\mathrm{-}}$

ORAL

Abstract

We have evaluated the dissociation energy of LiO$^{\mathrm{-}}$ through photo-fragmentation by measuring the kinetic energy release (KER) upon dissociation into Li$+$O$^{\mathrm{-}}$. Resonance-enhanced two-photon absorption was used to increase the rate of dissociating LiO$^{\mathrm{-}}$ by about two orders of magnitude over single-photon photodissociation. This REMPI-like process involves exciting LiO$^{\mathrm{-}}$ to an intermediate state from which photodissociation is more efficient. Using the measured KER distribution, we set a lower limit on the dissociation energy of 3.0$\pm$0.1 eV, which is 0.3 eV larger than the value based on theory.

*Supported by the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy under Award # DE-FG02-86ER13491.

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Authors

  • Ben Berry

    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan KS, USA

  • Bethany Jochim

    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan KS, USA

  • Travis Severt

    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA
    • J.R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS 66506, USA
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan KS, USA
    • Department of Physics, Kansas State University, Manhattan KS, USA
    • J.R. Macdonald Laboratory, Kansas State University, Manhattan, KS 66506

  • Peyman Feizollah

    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan KS, USA

  • Kanaka Raju Pandiri

    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan KS, USA
    • Department of Physics, Kansas State University, Manhattan KS, USA
    • J.R. Macdonald Laboratory, Kansas State University, Manhattan, KS 66506

  • K. D. Carnes

    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan KS, USA

  • B. D. Esry

    • Kansas State University
    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan KS, USA

  • Itzik Ben-Itzhak

    • J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan KS, USA
    • Department of Physics, Kansas State University, Manhattan KS, USA
    • J.R. Macdonald Laboratory, Kansas State University, Manhattan, KS 66506