Dynamics of the quenching of Na(3 2P J) by CO(X 1Σ+, v=0)

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Abstract
The vibrational energy distribution of the CO formed in the E→V energy transfer reaction: Na(3 2PJ) + CO (X 1Σ+, v=0)→Na(3 2S1/2) + CO (X 1Σ+, v?9) was determined at five temperatures between 486 and 672 K. The electronically excited Na atom was optically pumped by a dye laser operating at 590 nm and the CO vibrational energy distribution measured by means of a cw CO laser operating at 5 μm. The CO was found to have a near Poisson distribution, peaking at v=2, with little temperature effect. The efficiency of the E→V transfer was determined to be ∼35%. These findings are consistent with those predicted by a curve‐crossing model involving an ionic Na+(CO)− complex.

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