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Updated: May 15, 2025

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
Electron impact single and double ionization and dissociation: revisiting CF4 and CHF3 with an improved experimental
M Dogan1, W Wolff2, D M Mootheril1
1Max Planck Institute for Nuclear Physics, Heidelberg, Germany. A.Dorn@mpi-hd.mpg.de.
Abstract:
The absolute total and partial ionization cross sections resulting from electron collisions with fluorinated molecules CF4 and CHF3 were obtained by recoil-ion momentum spectroscopy with full acceptance for energetic ionic fragments. For absolute normalization the relative-flow technique was applied. The cross sections for single and double ionization as well as for dissociation were measured for electron energies from 20 eV to 1 keV. The data are compared with previous experiments and model calculations. The dissociation channel specific differences between CF4 and CHF3 are discussed. The present data are relevant for the evaluation of the electron interaction on these potent greenhouse gases with a high global warming potential in the Earth biosphere and in plasma and other industrial applications.
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