Journal
CHEMICAL PHYSICS
Volume 329, Issue 1-3, Pages 179-192Publisher
ELSEVIER
DOI: 10.1016/j.chemphys.2006.06.002
Keywords
MCTDH; IVR; vibrational energies; selective population; H2CS
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In the context of studies of the intramolecular vibrational-energy redistribution (IVR) in molecules with the aid of the multiconfiguration time-dependent Hartree (MCTDH) method, we simulate the dynamics of the selective population of vibrational levels in H2CS ill the presence of an external time-dependent field. The molecule is described by means of six valence polyspherical coordinates. The potential-energy surface (PES), the dipole moment function, and the kinetic energy are of direct-product form in these coordinates and hence perfectly adapted to MCTDH. In order to obtain the eigenstates and the corresponding transition moments of the system, recent developments of the MCTDH improved relaxation method, for which a first comprehensive description is given here, are exploited. (c) 2006 Elsevier B.V. All rights reserved.
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