MASARU FUKUSHIMA AND TAKASHI ISHIWATA, Faculty of Information Sciences, Hiroshima City University, Asa-Minami, Hiroshima 731-3194, Japan.
We have generated MgNC in supersonic free jet expansions, and observed the laser induced fluorescence (~LIF~) of the A 2 -- X 2 + transition. We measured the LIF dispersed fluorescence spectra from the single vibronic levels (~SVL~) on the Mg-N-C bending (~ 2~) mode in the upper A 2 state. On the basis of the vibronic structures in the SVL dispersed spectra, we discuss the vibrational structure of the ground X 2 + state of MgNC and the potential surface of the isomerization reaction, MgNC MgCN.