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Simultaneous Analysis of the ν2 Raman and ν2 + ν6 Infrared Spectra of the SF6 Molecule

✍ Scribed by D. Bermejo; R.Z. Martı́nez; E. Loubignac; V. Boudon; G. Pierre

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
241 KB
Volume
201
Category
Article
ISSN
0022-2852

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✦ Synopsis

High-resolution Raman spectra of the 2 band of SF 6 have been recorded at a temperature of 195 K (dry ice) and a pressure of 39 mbar. These spectra were analyzed using a new set of programs specially written for XY 6 molecules. These programs, called HTDS (highly spherical top data system) in reference to the set of programs called STDS (spherical top data system written for XY 4 molecules) can be freely accessible through ftp (user anonymous) at jupiter.u-bourgogne.fr or on the web at the URL http://www.u-bourgogne.fr/LPUB/shTDS.html. The study of 2 was made using a Hamiltonian developed through the third order. Four parameters were determined. The standard deviation obtained using about 559 data up to J Ͻ 61 is 0.0021 cm Ϫ1 . This result is used to refine by simultaneous analysis the 2 and 2 ϩ 6 bands of SF 6 . This new fit allows the determination for the first time of some 6 parameters. The values obtained for this band (forbidden in Raman and in infrared) will be used to study the infrared hot bands in the 3 and 4 regions.

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