First High-Resolution Raman Spectrum and Analysis of the ν5 Bending Fundamental of SF6

High-resolution Raman spectroscopy of the ν1 region and Raman–Raman double resonance spectroscopy of the 2ν1−ν1 band of 32SF6 and 34SF6. Determination of the equilibrium bond length of sulfur hexafluoride

“…It completes our recent studies of the SF 6 Raman-active fundamentals which were published in [11] (m 2 ) and [13] (m 5 ). This work has been realized for the two main isotopomers of SF 6 , namely 32 SF 6 (95.02% natural abundance) and 34 SF 6 (4.21% natural abundance).…”

“…The GS and m 6 parameters have been fixed to the values obtained in [11] and those of m 5 have been fixed to the values from [13]. For the GS, v 6 ¼ 1 and v 5 ¼ 1 levels, we took the same parameters for 32 SF 6 and 34 SF 6 .…”

“…It was also possible to perform a fit of m 1 þ m 5 À m 5 of 32 SF 6 using the m 5 parameters from [13]. Since the m 5 band of 34 SF 6 has not yet been analyzed, we did not fit the m 1 þ m 5 À m 5 hot band for this isotopomer.…”

“…However, as we have shown in a recent review article [9] and in previous papers [10][11][12][13][14], the spectroscopy of this molecule, which is essential for quantitative measurements in the atmosphere, is still insufficiently known. In particular, the region of the m 3 fundamental near 948 cm À1 is of primary importance since its very strong absorption is responsible for the huge greenhouse capabilities of SF 6 .…”

Spectroscopic tools for remote sensing of greenhouse gases CH 4 , CF 4 and SF 6

“…We are presently working on the analysis of the most important hot bands in the region, namely n 3 +n 6 n 6 and n 3 +n 5 n 5 . The last one should benefit from our recent study of the Raman spectrum of n 5 (Boudon and Bermejo 2002).…”