Knowledge Bank

Three new electronic transitions of CaS have been observed in the blue region of the spectrum. The vibrational bands in these transitions span thousands of $cm-1$ owing to a large change in geometry. Approximately $1000cm-1$ portion of the spectrum containing containing these bands has been recorded at high resolution by dye laser excitation spectroscopy and analyzed. The new states all have $\Omega =1$, and are tentatively labeled $G1\Pi$, $F1\Pi$, and $f3\Pi 3$. Spectroscopic constants have been generated for all three upper states and for the $X1\Sigma +$ State from a fit to 4340 individual lines. The most important constants determined were: