Main Index: Main Index WG4 Index: WG4 Index

MOLECULAR BROADENING

Many important results have been obtained, mainly in the infrared spectra. For astrophysical applications we will quote particularly the calculation of the broadening parameters of CO perturbed by He (55), and the self-broadening of $N$ $$₂ (56). Many theoretical or experimental investigations in this domain have been stimulated by new spatial observations of planenary atmospheres or by the need of new molecular data in particular for Jupiter and Titan atmospheres. Particular attention has been paid to collisional broadening in various bands of $CO$ $$₂ (55,57), $NH$ $$₃ (58-60), $CH$ $$₄ (61-68), $C$ $$₂H$$₂ (69), $C$ $$₂H$$₄ (70), $H$ $$₂O (71). A special attention has been paid to the problem of line mixing in CO (55), $CO$ $$₂ (55), $C$ $$₂H$$₂ (69). This considerable effort in molecular line broadening has contributed to improve molecular databases.