TUNABLE FAR IR LASER SPECTROSCOPY OF WEAKLY-BOUND CLUSTERS
Loading...
Date
1989
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
A spectrometer consisting of a tunable far IR (FIR) laser system and a planar supersonic jet has been constructed for the observation of low energy vibrations and tunneling motions of weakly bound clusters. The tunable FIR radiation is produced by non-linear mixing of a line tunable FIR laser and tunable (2 GHz - 80 GHz) microwave radiation in a GaAs barrier diode. The planar supersonic jet is produced by gas expansion through a 0.001'' by 1.75'' slit nozzle. A mass flow control/gas mixing system allows systematic and reproducible variation of the gas mixture ratios and pressures to optimize production of the species of interest. If the microwave spectrum of the species is known, this optimization may be performed while looking at a microwave signal with our microwave spectrometer (see R.E. Bumgarner and G.A. Blake paper presented at this symposium) prior to attempting the more tedious FIR experiment. FIR measurements on $(HCN)_{2}$, Ar-HCN and other species will be presented.
Description
Author Institution: Division of Geological and Planetary Sciences