Electron-Impact Dissociation of Methane into CH3 and CH2 Radicals I. Relative Cross Sections
- 1 November 1991
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 30 (11R)
- https://doi.org/10.1143/jjap.30.2908
Abstract
The abundances of primary neutral radicals CH3 and CH2 resulting from electron-impact dissociation of methane have been measured. This was accomplished with threshold-ionization mass spectrometry in a differentially pumped dual-electron-beam device. The relative partial cross sections for dissociation into CH3 and CH2 are reported for electron energies between 10 and 100 eV. A maximum cross section is found at 20-30 eV for both CH3 and CH2 radicals. At higher energies, the cross section decreases rather sharply, in particular for dissociation into the CH2 radical.Keywords
This publication has 13 references indexed in Scilit:
- Spatial distribution of CH3 and CH2 radicals in a methane rf dischargeApplied Physics Letters, 1990
- Observation of CH2 radical and comparison with CH3 radical in a rf methane dischargeApplied Physics Letters, 1989
- Measurements of swarm parameters and derived electron collision cross sections in methaneJournal of Applied Physics, 1989
- Mass spectroscopic investigation of the CH3 radicals in a methane rf dischargeApplied Physics Letters, 1989
- Electron-Impact Ionization and Dissociative Ionization of the Cand CFree RadicalsPhysical Review Letters, 1984
- Dissociation cross sections of silane and disilane by electron impactChemical Physics, 1982
- Application of the close-coupling method to excitation of electronic states and dissociation ofby electron impactPhysical Review A, 1978
- Dissociation of methane by electron impactThe Journal of Chemical Physics, 1975
- Radiation from CH4 and C2H4 produced by electron impactPhysica, 1971
- Radiolysis of Methane in a Wide-Range Radiolysis Source of a Mass Spectrometer. I. Individual and Total Cross Sections for the Production of Positive Ions, Negative Ions, and Free Radicals by ElectronsThe Journal of Chemical Physics, 1967