Molecular dissociation by electron impact: High Rydberg fragments from methane, ethylene, and ethane

Journal Article · Fri Jul 15 04:00:00 EDT 1977 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.434838· OSTI ID:7304589

Schiavone, J A; Donohue, D E; Freund, R S

Electron impact dissociation of CH/sub 4/, C/sub 2/H/sub 4/, and C/sub 2/H/sub 6/ produces high Rydberg H and C fragments. Time-of-flight measurements and excitation functions help to characterize the molecular processes involved. Although details differ, the three molecules display similar dissociation behavior; relatively low kinetic energy fragments (< or approx =8 eV) arise from states between 19 and 30 eV, higher kinetic energy fragments from states between 30 and 40 eV (states most likely with doubly ionized cores), and even higher kinetic energy fragments (up to 18 eV) from states above 40 eV. Comparisons of high Rydberg kinetic energy spectra with available ion kinetic energy spectra show general agreement confirming the utility of the core ion model for polyatomic molecules.

• Research Organization: Bell Laboratories, Murray Hill, New Jersey 07974
• OSTI ID: 7304589
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 67:2; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular &amp; Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKANES
ALKENES
CARBON
COLLISIONS
CRYOGENIC FLUIDS
DISSOCIATION
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY-LEVEL TRANSITIONS
ETHANE
ETHYLENE
FLUIDS
HYDROCARBONS
HYDROGEN
KINETICS
MATHEMATICAL MODELS
METHANE
MOLECULAR MODELS
MOLECULE COLLISIONS
MOLECULES
NONMETALS
ORGANIC COMPOUNDS
POLYATOMIC MOLECULES
REACTION KINETICS