Abstract

Double resonance spectroscopy is a powerful method to study stationary and dynamic properties of excited states of atoms and molecules.¹⁾ However, the method has been applied so far only for the allowed transitions. Recently detailed imformation on highly excited vibrational states is required to investigate the mechanisms of excitation, dissociation, reaction, and other various molecular processes.^2-4) Since high overtone absorption transitions are highly forbidden and very weak, the high power

© 1988 Optical Society of America