THE VISIBLE AND ULTRAVIOLET SPECTRUM OF SILVER CHLORIDE

$^{a}$R.M. lements and R.F. Barrow, Trans. Faraday Soc. 63, (1967) 2876-2878. $^{b}$H. Wang and J.L. Gole, J. Mole. Spectrosc. 161, (1993) 28-43. $^{c}$A. Ramirez-Solis and J. Schamps, J. Chem. Phys. 102, (1995) 4482-4490.Author Institution: Department of Chemistry, Southern Illionois UniversityThe visible and ultraviolet electronic transitions of AgCl were recorded at high resolution with the Fourier transform spectrometer associated with the McMath-Pierce Solar Telescope at Kitt Peak, AZ. The ultraviolet system was previously observed and assigned at a $0^{+} - X^{1}\Sigma^{+}$ $transition,^{a}$ while the visible transition is a new, violet-degarded electronic system near $25,500 cm^{-1}$. A similar, violet-degarded visible transition in AgF was recently $observed,^{b}$ and high-level ab initio $calculations^{c}$ on AgF have predicted that the excited state of this transition is a $^{3}\Sigma^{+}{_{1}}$ state. For the ultraviolet transition, the excited AgCl molecules were produced in a microwave discharge operated with 70 W absorbed power and at a total pressure of approximately 2 torr. For the visible system, a King-type carbon tube furnace was charged with AgCl powder and heated to 1900 C to produce the excited AgCl molecules. The molecular constants for the states involved will be presented