Rate constants for intermediate and high temperature /sup 4/He--H/sub 2/ and /sup 4/He--D/sub 2/ vibrational relaxation

Journal Article · Tue Mar 01 00:00:00 EST 1983 · J. Chem. Phys.; (United States)

OSTI ID:6425995

Jolicard, G; Grosjean, A

Rate constants for /sup 4/He--H/sub 2/ and /sup 4/He--D/sub 2/ vibrational relaxation are computed using the phase modulated semiclassical sudden approximation and compared with experiments for 100 K<3000 K. The Gordon--Secrest potential is used with a rotating Morse oscillator description of the H/sub 2/ and D/sub 2/ molecules. We carefully analyze the influence of the initial rotational distribution on the relaxation process and show that the upper rotational states (O< or =j< or =5) play an important role in the intermediate temperature range.

• Research Organization: Faculte des Sciences et des Techniques, Laboratoire de Physique Moleculaire, ERA n 834, La Bouloie, Route de Gray, 25030 Besancon Cedex, France
• OSTI ID: 6425995
• Journal Information: J. Chem. Phys.; (United States), Vol. 78:5
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
DEUTERIUM
ATOM-MOLECULE COLLISIONS
HELIUM
HYDROGEN
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
HIGH TEMPERATURE
KINETICS
MEDIUM TEMPERATURE
RELAXATION
ROTATIONAL STATES
SUDDEN APPROXIMATION
VIBRATIONAL STATES
ATOM COLLISIONS
COLLISIONS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
GASES
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MOLECULE COLLISIONS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
RARE GASES
STABLE ISOTOPES
640304* - Atomic
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Molecular &amp; Chemical Physics- Atomic &amp; Molecular Properties &amp; Theory