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  • Effects of orbital symmetries in dissociative ionization of molecules by few-cycle laser pulses

    Author(s)
    Alnaser, AS
    Maharjan, CM
    Tong, XM
    Ulrich, B
    Ranitovic, P
    Shan, B
    Chang, Z
    Lin, CD
    Cocke, CL
    Litvinyuk, IV
    Griffith University Author(s)
    Litvinyuk, Igor
    Year published
    2005
    Metadata
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    Abstract
    We have measured angular distributions of ion fragments produced in dissociative double ionization of CO, CO2, and C2H2 by intense ultrashort laser pulses. This report extends similar recent studies of O2 and N2 to a wider set of molecules. We found that for sub-10-fs pulses of sufficiently low intensity the fragments' angular distributions for all studied molecules are determined by angular dependence of the first ionization step. Those experimental angular distributions were in good agreement with angular dependent ionization probabilities calculated with the molecular tunneling ionization theory. The measured angular ...
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    We have measured angular distributions of ion fragments produced in dissociative double ionization of CO, CO2, and C2H2 by intense ultrashort laser pulses. This report extends similar recent studies of O2 and N2 to a wider set of molecules. We found that for sub-10-fs pulses of sufficiently low intensity the fragments' angular distributions for all studied molecules are determined by angular dependence of the first ionization step. Those experimental angular distributions were in good agreement with angular dependent ionization probabilities calculated with the molecular tunneling ionization theory. The measured angular distributions directly reflect the symmetry of the corresponding molecular orbitals. For higher laser intensities and longer pulse durations, dynamic alignment and postionization alignment start to affect the angular distributions and ion fragments are preferentially ejected along the laser-polarization direction.
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    Journal Title
    Physical Review A (Atomic, Molecular and Optical Physics)
    Volume
    71
    Issue
    3
    DOI
    https://doi.org/10.1103/PhysRevA.71.031403
    Subject
    Atomic and Molecular Physics
    Mathematical Sciences
    Physical Sciences
    Chemical Sciences
    Publication URI
    http://hdl.handle.net/10072/39386
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    • Journal articles

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