10min:

LEAH O'BRIEN, TENEIL KELLERMAN AND AMANDA LAMBETH, Department of Chemistry, Southern Illinois University, Edwardsville, IL 62026-1652.

The 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 as a 0⁺~-~ X ~^{1 +} transition, while the visible transition is a new, violet-degraded electronic system near 25,500~cm^-1. A similar, violet-degraded visible transition in AgF was recently observed,~and high-level ab initio calculations~on AgF have predicted that the excited state of this transition is a ^{3 +}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.