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Spectrum and dynamics of the CH chromophore in CD2HF. I. Vibrational Hamiltonian and analysis of rovibrational spectra

✍ Scribed by David Luckhaus; Martin Quack

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 440 KB
Volume: 190
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)85194-f

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✦ Synopsis

We have measured the complete rovibrational spectrum of dideutero-fluoro-methane (CD2HF) from the far-infrared (20 cm-1 ) to the visible ( 14000 cm-~ ) largely at Doppler-limited resolution. Rovibrational parameters are reported for CH-stretching and bending fundamentals and overtones. The spectra of the coupled stretching and bending modes of the CH chromophore are analyzed quantitatively both in terms of effective Hamiltonians and a three-dimensional model Hamiltonian. A new numerical method for solving the corresponding eigenvalue problem is described briefly. The strong Fermi and Darling-Dennison resonances lead to fast vibrational redistribution on the femtosecond time scale.

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