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

Authors
  • Yang, Benhui
  • Stancil, P C
  • Balakrishnan, N
  • Forrey, R C
Type
Published Article
Journal
The Journal of chemical physics
Publication Date
Oct 01, 2005
Volume
123
Issue
13
Pages
134326–134326
Identifiers
PMID: 16223307
Source
Medline
License
Unknown

Abstract

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 approximately 1000 cm-1 with CO being initially in the vibrational level upsilon=2 and rotational levels j=0,1,4, and 6. The He-CO interaction potential of Heijmen et al. [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 et al. [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 et al.

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