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Theoretical Chemistry Accounts

, Volume 102, Issue 1–6, pp 226–236 | Cite as

Theoretical studies of the potential energy surface and wavepacket dynamics of the Li3 system

  • Masahiro Ehara
  • Koichi Yamashita
Regular article

Abstract.

The three-dimensional (3D) potential energy surface of the ground state of Li3 was determined by the multireference configuration interaction method. The vibrational motions and pseudorotation were investigated by a 3D time-dependent wavepacket formalism. The analytical expression of the 3D surface is given and the results of vibrational analyses at several critical points are presented. The low-lying excited states of Li3 were examined for the C2 v structure and the vertical and adiabatic excitation energies were calculated. The ground and singlet excited states of Li2 were calculated and their spectroscopic constants compare well with the experimental values. A 3D wavepacket calculation was performed for simulations of the stimulated emission pumping spectrum in which the A state was taken as an intermediate. The recurrences of the autocorrelation functions were characterized by classical trajectory calculations. The autocorrelation functions obtained by wavepacket propagation are reproduced well by the accumulation of the classical trajectories in the short-time region.

Key words: Li3 Pseudorotations Wavepacket dynamics Potential energy surfaces 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • Masahiro Ehara
    • 1
  • Koichi Yamashita
    • 2
  1. 1.Department of Synthetic Chemistry and Biological Chemistry, Faculty of Engineering, Kyoto University, Kyoto 606-8501, JapanJP
  2. 2.Department of Chemical System Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, JapanJP

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