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Rare Gas Pressure Broadening of the NO Fundamental Vibrational Band

✍ Scribed by Robert S. Pope; Paul J. Wolf

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 162 KB
Volume: 208
Category: Article
ISSN: 0022-2852
DOI: 10.1006/jmsp.2001.8401

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✦ Synopsis

Pressure broadening of rotational transitions in the nitric oxide fundamental band was studied using Fourier transform spectroscopy. Rotational level dependent broadening coefficients were determined for both the 2 1/2 and 2 3/2 substates at 300 K using the five noble gases as the broadening species. Pressure broadening coefficients were also determined for Q-branch transitions using Ar as the collision partner. This information was subsequently used to study the broadening of the Q-branch absorption lines at 900 Torr total pressure. The high-pressure spectra showed significant deviations from a simple fit using a sum of Lorentzians that indicated the possible effects of line coupling.

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