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- Title
Charge exchange and excitation cross sections at collisions of alpha particles with be-like impurity oxygen ions in a plasma.
- Authors
Nikulin, V. K.; Guschina, N. A.
- Abstract
The charge exchange and excitation cross sections at collisions of alphas with O4+(1 s 22 s 2) impurity atoms in a hot plasma for striking energies E c varying from 20 keV to 2 MeV are determined for the first time. The cross sections are calculated using the method of close-coupling equations with 13 singlet four-electron quasi-molecular states taken as a basis. The partial cross sections of charge transfer to the 1 s, 2 s, and 2 p states of a He+ ion and for O4+(1 s 22 s 2) → O4+(1 s 22 lnl’) ( n = 2, 3) electronic excitation of an oxygen ion are found. The maximal value of the charge exchange total cross section roughly equals 2.2 × 10−16 cm2 at E c ≈ 0.7 MeV. The excitation total cross section has a maximum of ≈ 7.7 × 10−16 cm2 at E c ≈ 80 keV for single-electron excitation and ≈6.5 × 10−16 cm2 at E c ≈ 0.7 MeV for two-electron excitation.
- Subjects
CHARGE exchange; HIGH temperature plasmas; COLLISIONAL excitation; CHARGE transfer; QUASIMOLECULES; IONIZATION (Atomic physics)
- Publication
Technical Physics, 2006, Vol 51, Issue 10, p1276
- ISSN
1063-7842
- Publication type
Article
- DOI
10.1134/S1063784206100045