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The lifetime of the A1Π state of CO has been measured by using a pulsed invertron-excitation source and a delayed-coincidence measurement technique. The fourth positive system was examined to measure this lifetime. Eighteen bands, originating from the upper states υ′ = 0 to 5, were examined at pressures between 500 and 50 mtorr. No pressure dependence was noticed. The transition moment was found to vary and was expanded about the r centroid of the (0,0) transition. Oscillator strengths from this and other experiments are compared.
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Chervenak et al. (1971) studied this question.
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