Analysis of the CH3D Nonad from 2000 to 3300 cm−1

✍ Scribed by A Nikitin; L.R Brown; L Féjard; J.P Champion; Vl.G Tyuterev

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 615 KB
• Volume: 216
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2002.8566

✦ Synopsis

As part of the simultaneous analysis of line positions and intensities of the first two polyads of monodeuterated methane, the results achieved for the region 3-5 µm are reported. It involves the three highest fundamentals, (ν 1 , ν 2 , ν 4 ), overlapped by overtone (2ν 3 , 2ν 5 , 2ν 6 ) and combination (ν 3 + ν 6 , ν 3 + ν 5 , ν 5 + ν 6 ) bands. The theoretical model was based on the global tensorial model implemented in the MIRS package. Some 10 000 line positions and 2400 line intensities have been modeled to ±0.000 88 cm -1 and ±3.6% respectively, using measurements obtained at 0.0056 and 0.011 cm -1 resolution with the Fourier transform spectrometer at National Solar Observatory located at Kitt Peak. The strongest band in this polyad is ν 4 (E) at 3016.7 cm -1 with a strength of 6.3 × 10 -18 cm -1 /(molecule cm -2 ) at 296 K; the weakest band is 2ν 3 (E) at 2597.7 cm -1 with a strength of 1.9 × 10 -20 cm -1 /(molecule cm -2 ) at 296 K. The total calculated absorption arising from the CH 3 D nonad is 8.95 × 10 -18 cm -1 /(molecule cm -2 ) at 296 K.