Energy transfer as a function of collision energy. IV. State-to-state cross sections for rotational-to-translational energy transfer in HF+Ne, Ar, and Kr

Journal Article · Fri Jan 15 04:00:00 EST 1982 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.443062· OSTI ID:5880343

Barnes, J A; Keil, M; Kutina, R E; Polanyi, J C

State-to-state cross sections for rotationally inelastic collisions of HF (v,J) with Ne, Ar, and Kr have been measured. Laser pumping of the molecular beam to the initial states v = 1, J = 1--6, and v = 2, J = 2, followed by infrared fluorescence, permitted measurements of relative cross sections with Vertical Bar ..delta..J Vertical Bar< or =8. The collision energy was varied between 4 and 16 kcal/mol. These cross sections could be fitted well using an inverse-power dependence on the rotational energy gap (due to Pritchard and co-workers; J. Chem. Phys. 70, 4155 (1979)) for rotational energy transfers of up to 55% of the initial translational energy. The energy-corrected sudden approximation was used to determine an ''effective'' collision length for rotationally inelastic scattering. The scattering is thought to occur predominantly on the repulsive wall of the intermolecular potential, except for the J = 1..-->..J' = 0 transition, which is shown to be sensitive to the depth of the van der Waals attractive well.

• Research Organization: Department of Chemistry, University of Toronto, Toronto, Ontario, M5S 1A1 Canada
• OSTI ID: 5880343
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 76:2; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular &amp; Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
ELEMENTS
EMISSION SPECTRA
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
FLUIDS
GASES
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KRYPTON
MOLECULE COLLISIONS
NEON
NONMETALS
RARE GASES
ROTATIONAL STATES
SPECTRA