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- Title
Electron-impact double ionization of the carbon atom.
- Authors
Jonauskas, Valdas
- Abstract
Electron-impact single- and double-ionization cross sections and Maxwellian rate coefficients are presented for the carbon atom. Scaling factors are introduced for the electron-impact excitation and ionization cross sections obtained in the distorted wave (DW) approximation. It is shown that the scaled DW cross sections provide good agreement with measurements for the single ionization of the C atom and C1+ ion. The direct double-ionization (DDI) process is studied using a multi-step approach. Ionization–ionization, excitation–ionization–ionization, and ionization–excitation–ionization branches are analyzed. It is demonstrated that the three-step processes contribute ≼40% of the total DDI cross sections for the case where one of the electrons takes all of the excess energy after the first ionization process.
- Subjects
ELECTRON impact ionization; RELATIVISTIC electrodynamics; DWBA (Nuclear physics); ELECTRONS; ASTROPHYSICS
- Publication
Astronomy & Astrophysics / Astronomie et Astrophysique, 2018, Vol 620, pN.PAG
- ISSN
0004-6361
- Publication type
Article
- DOI
10.1051/0004-6361/201834303