Electron-impact dissociation of CH{sub 2}{sup +} ions: Measurement of CH{sup +} and C{sup +} fragment ions

Journal Article · Tue May 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.052715· OSTI ID:20982533

Vane, C R; Bahati, E M; Bannister, M E; Thomas, R D ^[1]

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1. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6372 (United States)

Absolute cross sections for electron-impact dissociation of CH{sub 2}{sup +} producing CH{sup +} and C{sup +} fragment ions were measured in the 3-100 eV range using a crossed electron-ion beams technique with total uncertainties of about 11% near the cross section peak. The cross sections are nearly identical for energies above 15 eV, but they are dramatically different at lower energies. The CH{sup +} channel exhibits a strong peak rising from an observed threshold of about 6 eV; the C{sup +} channel is relatively flat down to the lowest measured energy. Ionization cross sections for the CH{sub 2}{sup +} ion are also presented.

• OSTI ID: 20982533
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 75; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CARBON IONS
CATIONS
CROSS SECTIONS
DISSOCIATION
ELECTRON BEAMS
EV RANGE
ION BEAMS
IONIZATION
MOLECULAR IONS
ORGANIC COMPOUNDS