We report rate coefficients for rotational and vibrational transitions in CO induced by H atoms using quantum-mechanical scattering calculations and the H-CO interaction potential of Keller et al. We use the infinite-order sudden approximation for vibrational transitions and the close-coupling method for rotational transitions. Rate coefficients are presented for temperatures 5 K T 3000 K. Differences of a factor of 30 are found for rate coefficients for low temperatures below 100 K compared to earlier results of Green and Thaddeus. The discrepancies are attributed to the differences in the details of the interaction potentials, especially the long-range part to which the low-temperature rate coefficients are most sensitive. There is good spectroscopic evidence that the potential-energy surface employed here reproduces the resonance energies and widths of the HCO system better than any previously available HCO interaction potentials.
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机译:我们使用量子力学散射计算和Keller等人的H-CO相互作用势来报告由H原子诱导的CO旋转和振动跃迁的速率系数。对于振动跃迁,我们使用无穷阶突然逼近;对于旋转跃迁,我们使用闭合耦合方法。给出了温度为5 K 展开▼