Abstract

The band spectra of molecules have been theoretically investigated under conditions when the individual line components within the band are unresolved. In particular, treatments for diatomic molecule bands, the symmetric top molecule perpendicular bands, and the symmetric-top molecule parallel bands, are given. This treatment indicates the methods which may be followed in order to determine the molecular constants or molecular moments of inertia from unresolved spectra. The theory is illustrated by the computation of the O,ON2+ band and the CH3Br fundamental band for the diatomic and symmetric-top perpendicular band cases, respectively. Some features of the A10, and B00 absorption bands of C6H6 are also discussed.

© 1963 Optical Society of America

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