Effects of collision energy and vibrational excitation on H/sup +//sub 2/, HD/sup +/ + He reactions

Journal Article · Mon Oct 15 00:00:00 EDT 1984 · J. Chem. Phys.; (United States)

OSTI ID:6467724

Turner, T; Dutuit, O; Lee, Y T

An experimental study of proton and deuteron transfer in H/sup +//sub 2/ + He and HD/sup +/ + He has been carried out as a function of kinetic and vibrational energy. The data gives evidence that at lower kinetic energies, the spectator stripping mechanism indeed plays an important role when H/sup +//sub 2/ or HD/sup +/ is vibrationally excited. The H/sup +//sub 2/ (v = 0) reaction has a much smaller cross section than the v = 1--4 reactions and seems to go through intimate, small impact parameter collisions involving all the atoms. Investigation of the competition between both the proton and deuteron transfer channels for the HD/sup +/ case, shows that vibrational enhancement towards forming the HeD/sup +/ product falls off sooner with increasing kinetic energy than does the HeH/sup +/ product again in accordance with the spectator stripping model. The higher yield for HeH/sup +/ production at both higher vibrational levels of HD/sup +/ and at lower kinetic energy and the behavior of translational energy dependence of HeH/sup +/ seems to indicate the importance of the induced orientation of HD/sup +/ during the collision with He. Because of the displacement of the center of mass from the center of charge in HD/sup +/, the charge induced dipole interaction between He and HD/sup +/ tends to swing the H atom more towards He during the approach of He and HD/sup +/.

• Research Organization: Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Chemistry, University of California, Berkeley, California 94720
• OSTI ID: 6467724
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 81:8; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CHARGED PARTICLES
CHEMICAL REACTIONS
COLLISIONS
DEUTERIDES
DEUTERIUM COMPOUNDS
ELEMENTS
ENERGY
ENERGY LEVELS
EXCITED STATES
FLUIDS
GASES
HELIUM
HELIUM COMPOUNDS
HELIUM HYDRIDES
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN DEUTERIDE
HYDROGEN IONS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KINETIC ENERGY
MOLECULAR IONS
NONMETALS
RARE GAS COMPOUNDS
RARE GASES
VIBRATIONAL STATES