Abstract
Lifetimes have been measured at high resolution for 113 different rotational levels of the à 2Πu state in CO2+ using the High Frequency Deflection technique and cooled supersonic jet target. The results vary from 120 ns up to 170 ns for J' = 42½. A sudden increase at à 2Πu3/2 (000) J' = 15½ and à 2Πu1/2 (100) J' = 22½ indicate the presence of a new perturbation which causes unobservably small energy shifts. A lifetime increase is also observed for bands with excited bending vibrations which is interpreted in terms of the Renner-Teller effect.
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