Knowledge Bank

The $\gamma \prime (B3\Pi -X3\Delta )$ electronic system of gaseous titanium monoxide, TiO, has been photographed in emission at high dispersion of a 7 m Ebert spectrograph. The emission was excited by a 2450 MHz electrode Leas discharge in a flowing mixture of $TiCl4,O2$ and He. The effective rotational temperature of the TiO molecules in the $B3\Pi$ state was estimated to be $800\pm 300\circ K$. Rotational analyses have been carried out on the (0-0), (0-1), (1-0) and (1-1) bands up to $J\le 55$. Twenty-one branches (P, Q, and R) have been assigned for the (0-0) band. These include 12 branches belonging to the $\Delta \Sigma =\pm 1$, case (a) forbidden, subbands. For the other three bands, besides the 9 strong main branches $(\Delta \Sigma =0)$, only a few very weak and branch lines could be located. Most of the observed transitions are split into two well resolved components due to $\Lambda$-doubling in the $B3\Pi$ state. An earlier partial rotational analysis of the (0-0) band of the $\gamma \prime$ system by has been largely confirmed, but much extended, and corrected in some details, by the present work.