Site symmetry and effective Hamiltonians for H2X molecules in the local mode limit

Vladimir M. Mikhailov; O. V. Naumenko; M. A. Smirnov

doi:10.1117/12.336992

13 January 1999 Site symmetry and effective Hamiltonians for H₂X molecules in the local mode limit

Vladimir M. Mikhailov, O. V. Naumenko, M. A. Smirnov

Proceedings Volume 3583, Fifth International Symposium on Atmospheric and Ocean Optics; (1999) https://doi.org/10.1117/12.336992
Event: Fifth International Symposium on Atmospheric and Ocean Optics, 1998, Tomsk, Russian Federation

Abstract

The effective rotational Hamiltonian for the stretching modes of H₂X molecules have been analyzed on the base of the two conceptions: site-symmetry and linked groupings of vibrational rotational interactions. The site-symmetry of the effective Hamiltonian for the region of (v₁, v₃) dyad of H₂X molecules at the condition m_H << m_x is reduced to C_s symmetry, as compared with C₂V symmetry of the initial Hamiltonian. For the first time for H₂X molecule with strong Coriolis-type accidental resonance it had been shown that the parameters of effective Hamiltonian depend on groupings of vibrational- rotational interactions. This dependence from weak via middle to strong resonances has the trend to decrease. For H₂S molecule at the local mode limit, the effective Hamiltonian for Coriolis-type resonance don't depend on the groupings of initial Hamiltonian expansions. Two ways of experimental energy levels assignment for some vibrational polyads of H₂S molecule, based on the symmetry reduction conception have been presented.

Citation Download Citation

Vladimir M. Mikhailov, O. V. Naumenko, and M. A. Smirnov "Site symmetry and effective Hamiltonians for H₂X molecules in the local mode limit", Proc. SPIE 3583, Fifth International Symposium on Atmospheric and Ocean Optics, (13 January 1999); https://doi.org/10.1117/12.336992

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