Balakrishnan, N.Yan, M.Dalgarno, A.2019-09-272002Balakrishnan, N., M. Yan, and A. Dalgarno. 2002. “Quantum‐Mechanical Study of Rotational and Vibrational Transitions in CO Induced by H Atoms.” The Astrophysical Journal 568 (1): 443–47. https://doi.org/10.1086/321434.2041-82052041-8213http://nrs.harvard.edu/urn-3:HUL.InstRepos:41417370We 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.en-USJournal Article2019-09-2710.1086/321434