Vibrational--rotational relaxation from high vibrational states in He--HD

Journal Article · Thu Mar 01 04:00:00 EST 1979 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.437720· OSTI ID:6461970

Tarr, S M; Rabitz, H

The relaxation behavior of the He--HD system is studied by applying an exponential distorted wave procedure to calculate the cross sections and the rate constants for vibrational--rotational energy transfer in the vibrational manifolds n, 0< or =n< or =5. The rotational states are shown to play an important role in vibrational relaxation by providing many pathways for vibrational--rotational--translational energy exchange. By comparison with breathing sphere calculations it is demonstrated that the near exponential growth in the n..-->..n-1 rates from vibrotor calculations can be attributed not only to the vibrational anharmonicity but also to the decreasing rotational energy spacings as n increases.

• Research Organization: Department of Chemistry, Princeton University, Princeton, New Jersey 08540
• OSTI ID: 6461970
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 70:5; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular &amp; Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
CRYOGENIC FLUIDS
DEUTERIDES
DEUTERIUM COMPOUNDS
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
FLUIDS
HELIUM
HYDROGEN COMPOUNDS
HYDROGEN DEUTERIDE
MOLECULE COLLISIONS
NONMETALS
RARE GASES
RELAXATION
ROTATIONAL STATES
VIBRATIONAL STATES