		15min:

INVESTIGATION OF THE 19.5 CM^-1 BAND IN BENZENE-D₂O.

BRIAN S. MEEHAN, GEOFFREY A. BLAKE, California Institute of Technology, M/S 139-74, Pasadena, CA 91125.

The spectrum of benzene-D₂O has been Previously Investigated At Low Resolution Using Mass-Selective, Ionization-Loss Stimulated Raman Spectroscopy Tunable Far Infrared Laser (TuFIR) Spectroscopy^B. Some Of The Raman Active Bands Have Been Assigned By Direct comparison to high resolution spectra. However, the nature of the band centered about 19.5 cm^-1 remains unknown. By fitting high resolution rotational lines in this region to a Hamiltonian using \sl l -type doubling terms, it is seen that this motion is a bending mode, perpendicular to the symmetry axis, that is at least doubly degenerate. By direct comparison of the TuFIR and Raman data, it is possible to definitively confirm this assignment.

\linebreak ^a P. Maxton, M. Schaeffer, and P. Felker, Chem. Phys. Lett. \underline176, 603, 1995a. \linebreak ^b Sakae Suzuki, Ph.D Thesis, California Institute of Technology.