Absolute Intensity of the NH₃ ₂ Band

Authors: Fabian M.; Yamada K.M.T.

Source: Journal of Molecular Spectroscopy, Volume 198, Number 1, November 1999 , pp. 102-109(8)

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Abstract:

Absolute line intensities of NH₃ in the ₂ band were measured for a number of rovibrational lines using a high-resolution Fourier transform infrared spectrometer. The transition dipole moments calculated from the absolute intensities showed significant and systematic deviations from the usual rotational dependencies predicted from the J, K dependence of the direction–cosine matrix elements. The anomalous rotational dependencies may be explained by vibration–rotation interactions, and the Herman–Wallis-type rotational correction factors for a symmetric top molecule were determined experimentally for the first time in the present study. The self-broadening coefficients were determined as well. Copyright 1999 Academic Press.

Language: English

Document Type: Research article

DOI: http://dx.doi.org/10.1006/jmsp.1999.7937

Affiliations: National Institute for Advanced Interdisciplinary Research, Tsukuba, Ibaraki, 305-8562, Japan

Publication date: 1999-11-01