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    Laser-assisted charge-transfer reactions (Li(3)(+)+H): Coupled dressed-quasimolecular-state approach

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    ChuShih-I_7-1-1985.pdf (714.1Kb)
    Issue Date
    1985-07-01
    Author
    Ho, Tak-San
    Laughlin, Cecil
    Chu, Shih-I
    Publisher
    American Physical Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    A semiclassical coupled dressed-quasimolecular-states (DQMS) approach is presented for nonperturbative treatment of multichannel charge-transfer reactions at low collision velocities and high laser intensities, incorporating the implementation of the generalized Van Vleck (GVV) nearly degenerate perturbation theory. The GVV technique allows block partitioning of the infinite-dimensional Floquet Hamiltonian into a finite-dimensional model DQMS space, and thereby reduces greatly the number of effective coupled channels. Further, the GVV-Floquet basis allows minimization of the (usually large in amplitude) field-induced nonadiabatic radial couplings without the need to explicitly construct the transformation between the adiabatic and diabatic DQMS basis. This yields a new set of coupled GVV-DQMS equations (neither adiabatic nor diabatic) which are particularly convenient for multichannel calculations. The method is applied to the study of the laser-assisted charge-transfer process: Li(3+)+H(1s)+ħω→Li(2)+(n= 3)+H(+), using 2-, 5-, and 15- GVV-DQMS basis. It is found that while the 5-state results agree well with the 15-state calculations even up to very high intensities for the (LiH)3+ system, the 2-state basis is inadequate at high-intensity and lower-wavelength regimes. Detailed results and nonlinear dynamical features are presented for the process at small impact velocity 10(7) cm/s and strong laser fields with intensity ranging from 1 to 100 TW/cm(2) and wavelengths from 1500 to 3000 Å.
    Description
    This is the publisher's version, also available electronically from http://journals.aps.org/pra/abstract/10.1103/PhysRevA.32.122.
    URI
    http://hdl.handle.net/1808/16072
    DOI
    https://doi.org/10.1103/PhysRevA.32.122
    ISSN
    1050-2947
    Collections
    • Chemistry Scholarly Works [610]
    Citation
    Ho, Tak-San; Laughlin, Cecil; Chu, Shih-I. (1985). "Laser-assisted charge-transfer reactions (Li(3)(+)+H): Coupled dressed-quasimolecular-state approach." Physical Review A, 32(01):122. http://dx.doi.org/10.1103/PhysRevA.32.122

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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