Observation of autoionization processes in the production of excited CO2+ions

Abstract

The production of CO₂⁺(B² Sigma _u⁺( nu '=0) to x² Pi _g) fluorescence radiation by extreme ultraviolet excitation of CO₂ was experimentally investigated in the 650-685AA region using synchrotron radiation. The cross section for the production of fluorescence radiation was found to exhibit structural features corresponding to the Tanaka-Jursa-LeBlanc bands, indicating that the upper states associated with these bands interact with the CO₂⁺(B² Sigma _u⁺)+e^- continua, producing the ion in this excited state by autoionization.