Effect of collision energy and vibrational excitation on endothermic ion-molecule reactions

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6174574

Turner, T P

This thesis is divided into two major parts. In the first part an experimental study of proton and deuteron transfer in H2 + He and HD + He was carried out as a function of kinetic and vibrational energy. The data give evidence that at lower kinetic energies, the spectator stripping mechanism indeed plays an important role when H2 or HD is vibrationally excited. The H2 (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. The second half of this thesis examines the relative efficiencies between the excitation of C-C stretching vibration and collision energy on the promotion of the H atom transfer reaction of C2H2 + H2 C2H3 + H. At low collision energies, the reaction is strongly vibrationally enhanced in agreement with previous thermal energy studies. Translational energy was found to be not as effective as exciting the C-C stretching vibration in promoting the reaction.

• Research Organization: California Univ., Berkeley (USA)
• OSTI ID: 6174574
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ACETYLENE
ALKYNES
CATIONS
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY DEPENDENCE
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GASES
HELIUM
HYDROCARBONS
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 2 PLUS
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONS
MOLECULAR IONS
MOLECULE COLLISIONS
NONMETALS
ORGANIC COMPOUNDS
RARE GASES
VIBRATIONAL STATES