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  • Vibrationally resolved structure in O2+ dissociation induced by intense ultrashort laser pulses

    Author(s)
    Zohrabi, M
    McKenna, J
    Gaire, B
    Johnson, Nora G
    Carnes, KD
    De, S
    Bocharova, IA
    Magrakvelidze, M
    Ray, D
    Litvinyuk, IV
    Cocke, CL
    Ben-Itzhak, I
    Griffith University Author(s)
    Litvinyuk, Igor
    Year published
    2011
    Metadata
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    Abstract
    Laser-induced dissociation of O+ 2 is studied in the strong-?eld limit using two independent methods, namely a crossed laser-ion-beam coincidence 3D momentum imaging method and a supersonic gas jet velocity map imaging technique (790 and 395 nm, 8-40 fs, ~10 15 W/cm2 ). The measured kinetic energy release spectra from dissociation of O+ 2 and dissociative ionization of O2 reveal vibrational structure which persists over a wide range of laser intensities. The vibrational structure is similar for O+ 2 produced incoherently in an ion source and coherently by laser pulses. By evaluation of the potential ...
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    Laser-induced dissociation of O+ 2 is studied in the strong-?eld limit using two independent methods, namely a crossed laser-ion-beam coincidence 3D momentum imaging method and a supersonic gas jet velocity map imaging technique (790 and 395 nm, 8-40 fs, ~10 15 W/cm2 ). The measured kinetic energy release spectra from dissociation of O+ 2 and dissociative ionization of O2 reveal vibrational structure which persists over a wide range of laser intensities. The vibrational structure is similar for O+ 2 produced incoherently in an ion source and coherently by laser pulses. By evaluation of the potential energy curves, we assign the spectral energy peaks to dissociation of the v = 10-15 vibrational states of the metastable a 4 ??u state via the dissociation pathway |a 4 ??? ? |f 4 ??- 1??-a mechanism equivalent to bond softening in H+.
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    Journal Title
    Physical Review A
    Volume
    83
    DOI
    https://doi.org/10.1103/PhysRevA.83.053405
    Subject
    Atomic and Molecular Physics
    Mathematical Sciences
    Physical Sciences
    Chemical Sciences
    Publication URI
    http://hdl.handle.net/10072/40940
    Collection
    • Journal articles

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