Fast oscillating structures in electron spectra following Heq++He collisions (q=1,2) at low projectile energies

F. Frémont, A. Hajaji, A. Naja, C. Leclercq, J. Soret, J. A. Tanis, B. Sulik, J. Y. Chesnel

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Distributions of ejected electrons following collisions of slow He+ and He2+ ions and a He target were measured for projectile energies of 20 and 40 keV, respectively. The electrons were detected at angles of 30° and 90° with respect to the incident beam direction. Superimposed on a continuous background originating from target ionization, small amplitude, high-frequency oscillations are revealed. The frequency of these oscillations is found to be nearly independent of the projectile charge and observation angle. In view of recent experiments and calculations, the origin of such oscillations is discussed. Processes such as autoionization following the production of highly excited states, Fermi-shuttle ionization, or coherent electron emission caused by interference between the target centered and projectile centered amplitudes, are considered.

Original languageEnglish
Article number050704
JournalPhysical Review A
Volume72
Issue number5
DOIs
Publication statusPublished - Nov 2005

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projectiles
oscillations
collisions
ionization
electrons
autoionization
electron emission
energy
interference
excitation
ions

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)

Cite this

Frémont, F., Hajaji, A., Naja, A., Leclercq, C., Soret, J., Tanis, J. A., ... Chesnel, J. Y. (2005). Fast oscillating structures in electron spectra following Heq++He collisions (q=1,2) at low projectile energies. Physical Review A, 72(5), [050704]. https://doi.org/10.1103/PhysRevA.72.050704

Fast oscillating structures in electron spectra following Heq++He collisions (q=1,2) at low projectile energies. / Frémont, F.; Hajaji, A.; Naja, A.; Leclercq, C.; Soret, J.; Tanis, J. A.; Sulik, B.; Chesnel, J. Y.

In: Physical Review A, Vol. 72, No. 5, 050704, 11.2005.

Research output: Contribution to journalArticle

Frémont, F. ; Hajaji, A. ; Naja, A. ; Leclercq, C. ; Soret, J. ; Tanis, J. A. ; Sulik, B. ; Chesnel, J. Y. / Fast oscillating structures in electron spectra following Heq++He collisions (q=1,2) at low projectile energies. In: Physical Review A. 2005 ; Vol. 72, No. 5.
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