The effect of nonrigidity in the rotational structure of the spectra of molecules of water vapor and ammonia (Calculation of the dependence of rotational and centrifugal constants on vibration with great amplitude)
Abstract
Water vapor is one of the basic components which absorb infrared radiation in the atmosphere. Ammonia is found in the atmosphere of the planet Jupiter, and it is also present as a minor constituent in the terrestrial atmosphere. For the determination of the concentration of these gases in planetary atmospheres on the basis of spectroscopic measurements, and for a study of 'atmospheric windows' of transparency, it is necessary to have detailed information regarding the rotational level structure for excited vibrational states. However, the task of a theoretical prediction of such a structure and the calculation of the spectra of these gases is made rather complex by effects related to the nonrigidity of the molecules H2O and NH3. The results are presented of a numerical analysis regarding the dependence relations of a number of parameters for the NH3 and the H2O molecules. The analysis is based on a method considered by Starikov et al. (1980). The calculated relations for the rotational constants of the water molecule correspond satisfactorily to the experimentally determined data.
- Publication:
-
Spectroscopy of Atmospheric Gases
- Pub Date:
- 1982
- Bibcode:
- 1982sag..book...34S
- Keywords:
-
- Ammonia;
- Atmospheric Composition;
- Planetary Atmospheres;
- Rotational Spectra;
- Vibrational Spectra;
- Water Vapor;
- Atmospheric Windows;
- Infrared Radiation;
- Jupiter Atmosphere;
- Molecular Structure;
- Atomic and Molecular Physics