Coupled states cross sections for rotational excitation of H/sub 2/CO by He impact at interstellar temperatures
Cross sections for rotational excitation of ortho formaldehyde due to collision with helium are computed following the coupled states (CS) formalism and compared with recent coupled channel (CC) results obtained employing the same ab initio configuration interaction intermolecular potential. The CS equations are integrated at 9 scattering energies between 25 and 95degreeK using a basis set of 16 ortho H/sub 2/CO states (1< or =j< or =5). The CS procedure with the orbital angular momentum quantum number l set equal to the total angular momentum J yields the correct order of magnitude for scattering cross sections. Qualitative differences are found, however, in the energy dependence of some inelastic transitions. (AIP)
- Research Organization:
- Department of Chemistry and Inorganic Materials Research Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
- OSTI ID:
- 7236502
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 66:2; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ALDEHYDES
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
FORMALDEHYDE
HELIUM
MOLECULE COLLISIONS
NONMETALS
ORGANIC COMPOUNDS
RARE GASES
ROTATIONAL STATES