15min:
DISPERSED FLUORESCENCE SPECTROSCOPY OF THE B 2E' -- X 2A2' TRANSITION OF NO3.

MASARU FUKUSHIMA AND TAKASHI ISHIWATA, Faculty of Information Sciences, Hiroshima City University, Asa-Minami, Hiroshima 731-3194, Japan.

We have generated NO3 in supersonic free jet expansions and observed laser induced fluorescence (~LIF~) of the B 2E' -- X 2A2' transition. We have measured LIF excitation spectrum and dispersed fluorescence (~DF~) spectra from the single vibronic levels (~SVL~) of the B 2E' state. Comparing with the vibrational structures of the DF spectra, vibrational structure of the X 2A2' state has been analyzed. It is especially concluded that the 1,492 cm-1 level in the X 2A2' state has no contribution of the nu4 (~e'~) mode, though there are two opinions in which the level is attributed to the nu3 (~e'~) fundamental or the nu3+ nu4 combination level.