Studies of H/sup +/, H/sup +//sub 2/, and H/sup +//sub 3/ dissociative ionization fragments from methane, ethane, methanol, ethanol, and some deuterated methanols using electron-impact excitation and a time-of-flight method incorporating mass analysis
Journal Article
·
· J. Chem. Phys.; (United States)
OSTI ID:5699045
Kinetic energy distributions and relative intensities of energetic (>1eV) H/sup +/,H/sup +//sub 2/, and H/sup +//sub 3/ dissociative--ionization fragments from methane, ethane, ethanol, and methanol have been measured using pulsed electron-impact excitation and a time-of-fight method incorporating a new mass analysis technique. The various deuterated analogs of H/sup +/, H/sup +//sub 2/, and H/sup +//sub 3/ fragments were also observed from CH/sub 3/OD, CD/sub 3/OH, and CD/sub 3/OD. Results for these deuterated fragments show that energetic H/sup +//sub 2/ and H/sup +//sub 3/ fragments originate primarily from the -CH/sub 3/ group, rather than from H atom extraction from both the-CH/sub 3/ and -OH groups. Comparisons among the kinetic energy distributions of these light fragments from CH/sub 3/OH, CD/sub 3/OD, and CD/sub 3/OH reveal no major isotope effects for fragment energies exceeding 2 eV.
- Research Organization:
- Department of Physics, University of Arizona, Tucson, Arizona 85721
- OSTI ID:
- 5699045
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 71:12; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALCOHOLS
ALKANES
CATIONS
CHARGED PARTICLES
COLLISIONS
CRYOGENIC FLUIDS
DISSOCIATION
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ENERGY
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
ETHANE
ETHANOL
EXCITATION
FLUIDS
HYDROCARBONS
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
HYDROXY COMPOUNDS
IONIZATION
IONS
KINETIC ENERGY
MASS SPECTROSCOPY
METHANE
METHANOL
MOLECULAR IONS
MOLECULE COLLISIONS
ORGANIC COMPOUNDS
SPECTRA
SPECTROSCOPY
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALCOHOLS
ALKANES
CATIONS
CHARGED PARTICLES
COLLISIONS
CRYOGENIC FLUIDS
DISSOCIATION
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ENERGY
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
ETHANE
ETHANOL
EXCITATION
FLUIDS
HYDROCARBONS
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
HYDROXY COMPOUNDS
IONIZATION
IONS
KINETIC ENERGY
MASS SPECTROSCOPY
METHANE
METHANOL
MOLECULAR IONS
MOLECULE COLLISIONS
ORGANIC COMPOUNDS
SPECTRA
SPECTROSCOPY