The observation of stimulated emission pumping (SEP) spectra of free-jet-cooled NCS and C3 is reported. These species were generated by UV laser photolysis of a suitable precursor molecule in a large excess of inert gas in the throat of a supersonic free jet expansion. Individual rotational lines in the cold laser-induced fluorescence excitation spectrum were pumped and stimulated emission induced using two dye lasers pumped by a single excimer laser. The technique should be of general use in measuring vibronic level spacings in the ground electronic state of small free radicals.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry