Body-fixed formulation of rotational excitation: exact and centrifugal decoupling results for CO-He
- 11 July 1976
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 9 (10), 1823-1838
- https://doi.org/10.1088/0022-3700/9/10/025
Abstract
The problem of rotational excitation of a rigid rotor is formulated in a body-fixed frame of reference. Full account is taken of the simple form of the close-coupling equations to reduce the amount of computing time. In particular, the excitation of carbon monoxide (1 Sigma ground electronic state) by helium (1S ground electronic state) is considered, in the temperature conditions of the interstellar medium. Also, the validity of the centrifugal decoupling approximation is examined. It is found that good agreement is obtained in the partial cross sections for low J, the total angular momentum, and low rotor levels; for high J, the centrifugal decoupling cross sections converge too quickly.Keywords
This publication has 15 references indexed in Scilit:
- Validity of the coupled states approximation for molecular collisionsChemical Physics, 1976
- Accuracy of decoupling approximations for rotational excitation: low-energy COHe collisionsChemical Physics Letters, 1976
- Inelastic collisions between an atom and a diatomic molecule. I. Theoretical and numerical considerations for the close coupling approximationThe Journal of Chemical Physics, 1975
- Quantum mechanical close coupling approach to molecular collisions. jz -conserving coupled states approximationThe Journal of Chemical Physics, 1974
- On a semiclassical study of molecular collisions. I. General methodThe Journal of Chemical Physics, 1973
- Theory for the Forces between Closed-Shell Atoms and MoleculesThe Journal of Chemical Physics, 1972
- The numerical solution of coupled differential equations arising from the Schrödinger equationJournal of Computational Physics, 1970
- The theory of scattering by a rigid rotatorProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1960
- A method for the numerical integration of differential equations of second order without explicit first derivativesJournal of Research of the National Bureau of Standards, 1955
- The Scattering of Atoms from Diatomic MoleculesThe Journal of Chemical Physics, 1952