FOURIER TRANSFORM INFRARED EMISSION SPECTROSCOPY OF ScN.

Author Institution: Department of Chemistry, University of Arizona; Department of Chemistry, University of WaterlooThe near infrared electronic spectrum of ScN has been observed in the 1.6 to 1.8 $\mu$m spectral region using a Fourier transform spectrometer. The spectra have been excited in a Sc hollow cathode in the presence of a trace of $N_{2}$. The three bands with band origins at 5820.0944(5), 6051.2858(20) and $6266.1290(13) cm^{-1}$ have been assigned as the 0-0, 1-1 ad 2-2 bands of the $A^{1}\Sigma^{+}-X^{1}\Sigma^{+}$ electronic transition. The principal equilibrium constants for the ground state obtained from the fit of the observed lines are, $B_{c}^{\prime\prime} = 0.554609(17) cm^{-1}$, $r_{c}^{r} = 1.68723(3)$ \AA and the corresponding values for the excited state are, $B_{c}^{\prime} = 0.549143(17) cm^{-1}, r_{c} = 1.69540(3)$ \AA. Although ScN is a well known refractory solid, this work is the first observation of the gas-phase ScN molecule. The spectrum of WN has also been observed for the first time and the analysis is in progress