Enhancement of dielectronic processes in Ne10+ + He collisions at low keV energies

J.-Y. Chesnel (1) , B. Sulik (2) , H. Merabet (1) , C. Bedouet (3) , F. Frémont (3) , X. Husson (3) , M. Grether (1) , A. Spieler (1) , N. Stolterfoht (1)

1 Hahn-Meitner-Institut Berlin
2 ATOMKI - Institute for Nuclear Research [Budapest]
3 CIMAP - UMR 6252 - Centre de recherche sur les Ions, les MAtériaux et la Photonique

The method of high-resolution Auger spectroscopy was used to study mechanisms for double-electron capture producing the projectile configurations 3lnl′ and 4lnl′ (n>~4) in Ne10+ + He collisions. Emphasis was given to slow collisions with projectile energies near 1 keV. At low collision energies the production of the configurations 3lnl′ (n>~6) of nonequivalent electrons is found to become dominant. It is shown that dielectronic processes produced by the electron-electron interaction play a major role in the creation of the Ne8+(3lnl′) states.

Mots clés: Electron capture; Double electron capture; electron-electron interaction; electron correlation; dielectronic processes; configurations of nonequivalent electrons; doubly-excited states; Auger decay; Auger spectroscopy; ion-atom collisions

Domaines: Physique Atomique [physics.atom-ph]; Physique [physics]

J.-Y. Chesnel, B. Sulik, H. Merabet, C. Bedouet, F. Frémont, et al.. Enhancement of dielectronic processes in Ne10+ + He collisions at low keV energies. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 1998, 57 (5), pp.3546. ⟨10.1103/PhysRevA.57.3546⟩. ⟨hal-01216818⟩