Mechanisms for double-electron capture producing projectile doubly excited states in O6+ + He and Ne10+ + He collisions are studied. Emphasis is given to slow collisions with projectile energies of a few keV. At these impact energies the production of configurations nln′ l′ of nonequivalent electrons (n′ ≫ n) is dominant. It is shown that the creation of nonequivalent electron states O4+ (1s22pn′ l′) and Ne8+ (3ln′ l′) with n′ ≥ 6 originates from dielectronic processes involving electron-electron interaction. After the collision the populated excited states decay either by Auger electron emission or by radiative (photon) emission. Individual contributions to radiative stabilization of the Ne8+ (nln′ l′) states (n = 3-4) are studied in the impact-energy range from 1-150 keV. The relative importance of the different contributions to stabilization changes significantly with varying collision energy. At 1 keV the major contribution is due to the decay of the configurations 3lnl′ (n ≥ 6) created by collisional dielectronic processes.
|Number of pages||11|
|Journal||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|Publication status||Published - jún. 3 1999|
|Event||Proceedings of the 1998 7th Workshop on Fast Ion-Atom Collisions - Debrecen, Hung|
Duration: szept. 9 1998 → szept. 11 1998
ASJC Scopus subject areas
- Nuclear and High Energy Physics