A breakdown of the standard Watson-type rotational Hamiltonian was suggested for a molecule with H 2 XYZ structure [S Λ. Urban and K. M. T. Yamada, J. Mol. Spectrosc. 160, 279-288 (1993)]. This breakdown is due to a near-resonant interaction between the ground state rotational levels and rotational
A Breakdown of the Watson-Type Hamiltonian for Some Asymmetric Top Molecules
β Scribed by S. Urban; K.M.T. Yamada
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 421 KB
- Volume
- 160
- Category
- Article
- ISSN
- 0022-2852
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β¦ Synopsis
The published ground state molecular parameters of diazomethane and ketene suggest a breakdown of the standard Watson-type rotational Hamiltonian due to resonant interactions between the ground state rotational levels and some levels in an excited vibrational state. It is shown that the effective rotational Hamiltonian in its standard power-series expansion converges only within a limited range of rotational quantum numbers. For given magnitudes of centrifugal distortion parameters (C_{s}^{\alpha \beta \beta}), the range of convergence is determined by the relative values of rotational constants and normal frequencies. (c) 1993 Academic Press. Inc.
π SIMILAR VOLUMES
A complete expression of the effective Hamiltonian, and of the generators of its transformation to the reduced form, is considered as a Taylor series in dynamic variables for the \(E\)-type vibrational state of a rigid molecule with a point symmetry group \(C_{3 \mathrm{v}}\). The suggested reductio