Publication Type
Journal
Journal Name
Physical Review A
Publication Date
Page Number
052715
Volume
75
Issue
5
Abstract
Absolute cross sections for electron-impact dissociation of CH<sub>2</sub><sup>+</sup>
producing CH<sup>+</sup> and C<sup>+</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>+</sup> channel exhibits a strong peak rising from an observed threshold of about 6 eV; the C+ channel is relatively flat down to the lowest measured energy. Ionization cross sections for the CH<sub>2</sub><sup>+</sup> ion are also
presented.
