Advertisement

Discussion of Results and General Conclusions

  • Academician D. V. Skobel’tsyn
Part of the The Lebedev Physics Institute Series book series (LPIS, volume 39)

Abstract

In the modern version of the theory largely developed by M, V. Vol’kenshtein, a distinction is made between mechanical and electro-optical anharmonicity when considering overtones and composite frequencies. Mechanical anharmonicity means a deviation of the potential-energy function from the qua’dratic relationship. Electro-optical anharmonicity means a nonlinear dependence of the electrical moment or polarizability on the normal vibrational coordinates. The numerical values of the overtone frequencies are determined by the mechanical anharmonicity, and their electro-optical properties (intensity and polarization) by both the mechanical and electro-optical anharmonicities. In the presence of mechanical anharmonicity the concept of normal coordinates and normal vibrations loses its meaning. Nevertheless, for purposes of calculation one usually employs normal coordinates as a zero approximation, introducing anharmonic corrections as perturbations.

Keywords

Polyatomic Molecule Molecular Vibration Harmonicity Coefficient Fermi Resonance Anharmonicity Constant 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Consultants Bureau 1969

Authors and Affiliations

  • Academician D. V. Skobel’tsyn
    • 1
  1. 1.P. N. Lebedev Physics InstituteAcademy of Sciences of the USSRMoscowRussia

Personalised recommendations