Close-coupling study of rotational energy transfer of CO (ν=2) by collisions with He atoms

Benhui Yang, P. C. Stancil, N. Balakrishnan, R. C. Forrey

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Quantum close-coupling scattering calculations of rotational energy transfer in the vibrationally excited CO due to collisions with He atom are presented for collision energies between 10-5 and ∼1000 cm-1 with CO being initially in the vibrational level v=2 and rotational levels j=0,1,4, and 6. The He - CO interaction potential of Heijmen [J. Chem. Phys. 107, 9921 (1997)] was adopted for the calculations. Cross sections for rovibrational transitions and state-to-state rotational energy transfer from selected initial rotational levels were computed and compared with recent measurements of Carty [J. Chem. Phys. 121, 4671 (2004)] and available theoretical results. Comparison in all cases is found to be excellent, providing a stringent test for the scattering calculations as well as the reliability of the He - CO interaction potential by Heijmen

Original languageEnglish (US)
Article number134326
JournalJournal of Chemical Physics
Issue number13
StatePublished - Oct 3 2005

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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