Vibrational-rotational deexcitation of HF in collision with He
State-to-state cross sections are reported for vibrational-rotational transitions for HF in collisions with He, at collisional energies of 0.5 and 1.0 eV. These were computed within the infinite-order sudden (IOS) approximation using adiabatic, distorted-wave techniques. Values are tabulated for the vibrational-rotational deexcitation sequences (v, j) ..-->.. (v--1, 0), with v = 1, 2, 3, 4 and j = 0 -- 40. These quenching cross sections can be used in conjunction with IOS factorization formulas to compute VRT cross sections for final rotational states other than j/sub f/ = 0. In addition to IOS results, vibrational quenching cross sections were computed using the much more simple breathing-sphere technique. The breathing-sphere results compare favorably to the more accurate IOS results, particularly as to energy dependence. This suggests a simple method of utilizing known quenching cross sections to predict values for different vibrational levels and/or collisional energies.
- Research Organization:
- Department of Physics, University of Missouri-Rolla, Rolla, Missouri 65401
- OSTI ID:
- 5541368
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 79:8; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Quantum scattering calculations for ro-vibrational de-excitation of CO by hydrogen atoms
Vibrational-rotational-translational energy transfer in Ar + OH. Quasiclassical trajectory state-to-state cross sections
Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FLUIDS
GASES
HELIUM
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MOLECULE COLLISIONS
NONMETALS
RARE GASES
RELAXATION
ROTATIONAL STATES
VIBRATIONAL STATES