Dominant two-center electron-electron interactions in collisions of 120-MeV Ne6+ ions with gas targets

B. Sulik, S. Ricz, I. Kádár, G. Xiao, G. Schiwietz, K. Sommer, P. Grande, R. Köhrbrück, M. Grether, N. Stolterfoht

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The target gases H2, He, CH4, N2, Ne, and Ar were bombarded by 120-MeV Ne6+ ions to study the 2s-nl excitation from the metastable state 1s22s2p 3P0 of the Ne6+ projectile. The Coster-Kronig electrons from the transition 1s22pnl (n7)-1s22s+e- were measured using the method of zero-degree electron spectroscopy. It was found that the production cross section for the Coster-Kronig electrons is roughly proportional to the target atomic number. The experimental data are in agreement with impact-parameter calculations, which take into account the quenching of the 3P0 metastable state of the projectile, by exciting or ionizing its 2p electron. This agreement supports the conclusion that the dielectronic two-center process is dominant in the production of Coster-Kronig electrons following the 2s-nl excitation of the projectile by H2 and He targets (>56%), and remains significant for the other investigated targets (>22%).

Original languageEnglish
Pages (from-to)387-391
Number of pages5
JournalPhysical Review A
Volume52
Issue number1
DOIs
Publication statusPublished - 1995

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electron scattering
projectiles
collisions
gases
metastable state
ions
electrons
excitation
electron spectroscopy
quenching
cross sections

ASJC Scopus subject areas

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

Cite this

Dominant two-center electron-electron interactions in collisions of 120-MeV Ne6+ ions with gas targets. / Sulik, B.; Ricz, S.; Kádár, I.; Xiao, G.; Schiwietz, G.; Sommer, K.; Grande, P.; Köhrbrück, R.; Grether, M.; Stolterfoht, N.

In: Physical Review A, Vol. 52, No. 1, 1995, p. 387-391.

Research output: Contribution to journalArticle

Sulik, B, Ricz, S, Kádár, I, Xiao, G, Schiwietz, G, Sommer, K, Grande, P, Köhrbrück, R, Grether, M & Stolterfoht, N 1995, 'Dominant two-center electron-electron interactions in collisions of 120-MeV Ne6+ ions with gas targets', Physical Review A, vol. 52, no. 1, pp. 387-391. https://doi.org/10.1103/PhysRevA.52.387
Sulik, B. ; Ricz, S. ; Kádár, I. ; Xiao, G. ; Schiwietz, G. ; Sommer, K. ; Grande, P. ; Köhrbrück, R. ; Grether, M. ; Stolterfoht, N. / Dominant two-center electron-electron interactions in collisions of 120-MeV Ne6+ ions with gas targets. In: Physical Review A. 1995 ; Vol. 52, No. 1. pp. 387-391.
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AU - Kádár, I.

AU - Xiao, G.

AU - Schiwietz, G.

AU - Sommer, K.

AU - Grande, P.

AU - Köhrbrück, R.

AU - Grether, M.

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AB - The target gases H2, He, CH4, N2, Ne, and Ar were bombarded by 120-MeV Ne6+ ions to study the 2s-nl excitation from the metastable state 1s22s2p 3P0 of the Ne6+ projectile. The Coster-Kronig electrons from the transition 1s22pnl (n7)-1s22s+e- were measured using the method of zero-degree electron spectroscopy. It was found that the production cross section for the Coster-Kronig electrons is roughly proportional to the target atomic number. The experimental data are in agreement with impact-parameter calculations, which take into account the quenching of the 3P0 metastable state of the projectile, by exciting or ionizing its 2p electron. This agreement supports the conclusion that the dielectronic two-center process is dominant in the production of Coster-Kronig electrons following the 2s-nl excitation of the projectile by H2 and He targets (>56%), and remains significant for the other investigated targets (>22%).

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