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 C 2 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.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Price excludes VAT (USA)
Tax calculation will be finalised during checkout.
Received: 2 July 1998 / Accepted: 3 September 1998 / Published online: 8 February 1999
Rights and permissions
About this article
Cite this article
Ehara, M., Yamashita, K. Theoretical studies of the potential energy surface and wavepacket dynamics of the Li3 system. Theor Chem Acc 102, 226–236 (1999). https://doi.org/10.1007/s002140050493
- Key words: Li3
- Wavepacket dynamics
- Potential energy surfaces