Double-electron capture and radiative stabilization processes in slow ion-atom collisions

J. Y. Chesnel, F. Frémont, B. Sulik, C. Ruiz-Méndez, H. Merabet, C. Bedouet, X. Husson, M. Grether, N. Stolterfoht

Research output: Contribution to journalConference article

10 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)142-152
Number of pages11
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume154
Issue number1-4
DOIs
Publication statusPublished - Jun 3 1999
EventProceedings of the 1998 7th Workshop on Fast Ion-Atom Collisions - Debrecen, Hung
Duration: Sep 9 1998Sep 11 1998

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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