Analytical and numerical calculations of the cross sections of the rotational excitation of diatomic molecules in collisions with atoms

Journal Article · Sun Apr 01 04:00:00 EST 1984 · Opt. Spectrosc. (Engl. Transl.); (United States)

OSTI ID:6262362

Mukhametzyanov, R E

The present paper describes calculations of the total cross sections for the rotational excitation of diatomic molecules in collisions with atoms for the case of the systems Ar--Li/sub 2/, He--H/sub 2/, and Ar--LiH. For this purpose, the previously proposed theory )G. V. Dubrovskii and L. F. Vyunenko, Zh. Eksp. Teor. Fiz. 80, 66 (1981) (Sov. Phys. JETP 53, 32 (1981))), based on a 3-D Bessell approximation of the amplitude of the rotational excitation, was used. Comparison with the calculations of other authors and with experimental data shows that the version of the quasi-classical theory used has a good accuracy. Simple analytical approximations for the cross sections have been obtained, which are convenient for use in the interpretation of experiments on rotational relaxation in gas streams, and also in other problems of relaxation gasdynamics.

• OSTI ID: 6262362
• Journal Information: Opt. Spectrosc. (Engl. Transl.); (United States), Journal Name: Opt. Spectrosc. (Engl. Transl.); (United States) Vol. 56:4; ISSN OPSUA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METAL COMPOUNDS
ALKALI METALS
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
CROSS SECTIONS
DIMERS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GASES
HELIUM
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
LITHIUM
LITHIUM COMPOUNDS
LITHIUM HYDRIDES
METALS
MOLECULE COLLISIONS
NONMETALS
RARE GASES
RELAXATION
ROTATIONAL STATES
TOTAL CROSS SECTIONS