The high resolution spectra of the 1 - 2 and 2 - 3 transitions between excited vibrational levels of SF₆ molecules cooled to T equals 30 K in supersonic jets have been experimentally investigated by the double resonance method. A tunable high pressure CO₂ laser was used to excite molecules and the excited transitions were probed with a tunable diode laser. A computer simulation of the experimental spectra has been made. The agreement of the experimental and calculated spectra was attained with an accuracy of 10^-3 cm^-1, while the values of anharmonicity constants for the (nu) ₃ mode of the SF₆ molecule were refined. The matrix elements of the dipole moment of the excited transitions and the wide range spectra of 1 - 2, 2 - 3, 3 - 4 transitions in SF₆ were also calculated.

Date Published: 1 April 1992
PDF: 10 pages
Proc. SPIE 1724, Tunable Diode Laser Applications, (1 April 1992); doi: 10.1117/12.140322

Published in SPIE Proceedings Vol. 1724:
Tunable Diode Laser Applications
Alexander I. Nadezhdinskii; Alexander M. Prokhorov, Editor(s)