Abstract

Far-infrared laser magnetic resonance is used to measure rotational spectra of simple cations generated in intracavity discharges.^1,2 Hyperfine energy levels are resolved, revealing the electron spin density distribution in the molecules. A similar technique, employing an intracavity supersonic free jet and an electric field for tuning, is used to measure vibration-rotation spectra of Van der Waals bonds. The bend and stretch motions of the Van der Waals bonds³ in ArHCl and KrHCl have been studied with hyperfine resolution. A detailed description of the potential energy surface is obtained from analysis of these spectra.

© 1986 Optical Society of America