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Nascent Rovibrational Distributions of CO(d3Δi, a′3Σ+) Produced by Excitation-Transfer Reactions from Xe(3P2) to 12CO and 13CO at Thermal Energy

The excitation-transfer reactions from Xe(3P2) to 12CO and 13CO at 39 meVcm have been studied using a beam apparatus. The near-resonant endoergic d3Δi(v′=6, 7) and a′3Σ+(v′=11) levels of CO were selectively excited for both isotopes. The nascent rovibrational distributions of CO(d, a′) were determined from a spectral simulation. The rotational distributions were expressed by Boltzmann temperatures of 300-650 K for all levels. The low rotational excitation was explained by the fact that curve crossings between the entrance and exit potentials occur in the attractive region of the exit potentials. The spin-orbit state selectivity was estimated for the population of the 12CO(d3Δ1,2,3:v′=6) sublevels.