T. Sako et al., Classical-limit analysis of the normal-to-local transition by the algebraic effective Hamiltonian approach, J CHEM PHYS, 114(21), 2001, pp. 9441-9452
A classical phase space analysis is performed for the stretch vibrations of
H2O and SO2 by taking the classical limit of the algebraically expanded ef
fective Hamiltonian. It is demonstrated that the Hamiltonian surface specif
ied by a multiplet quantum number, represented by two intrinsic phase-space
variables, is useful in characterizing the transition from a normal mode t
o a local mode. From the classical trajectories on the Hamiltonian surfaces
, the onset of the normal-to-local transition in the highly excited SO2 is
clearly identified, which could not appear directly in the nodal patters of
the vibrational wave functions. (C) 2001 American Institute of Physics.