Vibrational state distributions of H/sup +//sub 2/(v'') resulting from the electron transfer reactions H/sup +//sub 2/(v'/sub 0/ = 0, 1) +H/sub 2/(v''/sub 0/ = 0). -->. H/sub 2/(v')+H/sup +//sub 2/(v'') in the collisional energy range of 2--16 eV

Journal Article · Wed Jan 01 00:00:00 EST 1986 · J. Chem. Phys.; (United States)

OSTI ID:6336814

Liao, C L; Ng, C Y

The vibrational state distributions of product H/sup +//sub 2/(v'') resulting from the symmetric charge transfer reactions H/sup +//sub 2/(v'/sub 0/ = 0 or 1) +H/sub 2/(v''/sub 0/ = 0) ..-->..H/sub 2/(v') +H/sup +//sub 2/(v'') in the center-of-mass collisional energy (E/sub c.m./) range of 2--16 eV have been measured by the charge exchange method. When reactant H/sup +//sub 2/ ions are prepared in v/sup prime//sub 0/ = 0, the majority (>80%) of product H/sup +//sub 2/ ions are formed in v'' = 0. The vibrational relaxation channel for forming H/sup +//sub 2/(v'' = 0) is found to be much more efficient than the vibrational excitation process for producing H/sup +//sub 2/(v'' = 2) in the H/sup +//sub 2/(v/sup //sub 0/ = 1) +H/sub 2/(v/sup double-prime//sub 0/ = 0) charge transfer collisions. The experiment also reveals that inelastic charge transfer channels become more important as E/sub c.m./ is increased. The vibrational state distributions of product H/sup +//sub 2/(v'') determined at E/sub c.m./ = 8 and 16 eV are compared with results of the semiclassical energy conserving trajectory calculations of Lee and DePristo. A better agreement between experimental and theoretical results is observed at E/sub c.m./ = 16 eV, a collisional energy at which charge transfer is the overwhelming channel.

• Research Organization: Ames Laboratory, U. S. Department of Energy, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6336814
• Journal Information: J. Chem. Phys.; (United States), Vol. 84:1
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HYDROGEN
ION-MOLECULE COLLISIONS
HYDROGEN IONS 1 PLUS
MOLECULAR IONS
CHARGE EXCHANGE
ENERGY-LEVEL TRANSITIONS
CHEMICAL REACTIONS
DISTRIBUTION
ELECTRON TRANSFER
EV RANGE 01-10
EV RANGE 10-100
EXCITATION
RELAXATION
VIBRATIONAL STATES
CATIONS
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EV RANGE
EXCITED STATES
HYDROGEN IONS
ION COLLISIONS
IONS
MOLECULE COLLISIONS
NONMETALS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena