roovibratsioonilised

Roovibratsioonilised is a term used in Estonian-language science to describe phenomena arising from rovibrational motion in molecules—the coupling of rotational and vibrational motions that shapes molecular energy levels. The term is formed from rotatsioon (rotation) and vibratsioon (vibration) with the suffix -iline, and is typically written as rovibratsiooniline in the singular and roovibratsioonilised (or rovibratsioonilised) in the plural, with occasional hyphenation ro-vibratsiooniline in some sources.

In practice, roovibratsioonilised properties refer to rovibrational states and transitions encountered in molecular spectroscopy. The rovibrational Hamiltonian describes energy contributions from rotation, vibration, and their coupling. Spectroscopic consequences include banded structures in infrared and near-infrared spectra; selection rules govern transitions between rovibrational levels, yielding P- and R-branches in diatomic and polyatomic molecules.

Use and scope: The concept is central to fields such as physical chemistry, atmospheric science, astrophysics, and combustion research, where accurate modeling of molecular spectra is essential for temperature and composition analysis. The term is descriptive rather than a separate discipline, used to characterize the combined rovibrational aspects of molecular spectra and energy-level diagrams.

See also: rovibrational spectroscopy, rotational spectroscopy, vibrational spectroscopy, molecular spectroscopy, quantum chemistry. Etymology: a compound formed from rotatsioon and vibratsioon with the common Estonian adjective suffix -iline; spelling may vary by source.