3 March 1997 Rotational dependence of Fermi-type resonance interactions in molecules
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Proceedings Volume 3090, 12th Symposium and School on High-Resolution Molecular Spectroscopy; (1997) https://doi.org/10.1117/12.267752
Event: 12th Symposium and School on High Resolution Molecular Spectroscopy, 1996, St. Petersburg, Russian Federation
In Pasadena, (Milliken Lab., USA, 1930) F. Rossetti has observed in Raman spectrum of carbon-dioxide molecule the full symmetric vibration of carbon dioxide appeared as the group of four near lying lines instead of the waited single line. The true interpretation of this enigmatic effect (in that time) was given by E. Fermi -- accidental degeneration of the first excited state of the full symmetric vibration in carbon dioxide. It was the first example of the event observed later in various organic molecules. This event was named as resonance Fermi. The rotational dependence of Fermi type resonance interactions in quasirigid molecules in dominant approximation can be selected in an expansion of the effective vibration-rotation Hamiltonian Hvib- roteff by the operator H(g)(Fermi) equals H30 plus (Sigma) nH3n(g). Let us consider in detail the problem of the construction of the effective vibration-rotational Hamiltonian HVR yields Heff from the point of view of various ordering schemes (grouping) of the vibrational-rotational interactions with sequential analysis of the choice of the convenient grouping adequate to the spectroscopic problem.
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Vladimir M. Mikhailov, Vladimir M. Mikhailov, M. A. Smirnov, M. A. Smirnov, } "Rotational dependence of Fermi-type resonance interactions in molecules", Proc. SPIE 3090, 12th Symposium and School on High-Resolution Molecular Spectroscopy, (3 March 1997); doi: 10.1117/12.267752; https://doi.org/10.1117/12.267752

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