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FTIR Measurements of N2-Induced Pressure Broadening of Allene (C3H4) in the ν10 Band

✍ Scribed by W.F. Wang; J.M. Sirota; D.C. Reuter

Book ID
102599406
Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
200 KB
Volume
198
Category
Article
ISSN
0022-2852

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✦ Synopsis

Nitrogen pressure-broadening coefficients have been measured in the 841 cm(-1) nu(10) band of allene (H(2)C&dbondC&dbondCH(2)). The high-resolution absorption infrared spectra were recorded by a FTIR spectrometer at a temperature of 201 K. The Voigt line profile, convolved with a sinc instrument function, was applied to the fit of the observed rovibrational lines. No regular J or K dependence of the broadening coefficients was observed for this strong symmetric-top-molecule band. The power-exponential-gap (PEG) fitting law and the infinite-order-sudden (IOS) scaling law were modified for the fit of the N(2)-broadening coefficients. The wavefunction mixing arising from the nu(10)/nu(9) Coriolis resonance was taken into account for the IOS law. A total of 180 broadening coefficients measured at 201 K were reproduced with an accuracy of 8.6 and 7.9% by the PEG and IOS laws, respectively. Copyright 1999 Academic Press.

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