A simple theoretical approach to multiple ionization and its application for 5.1 and 5.5 MeV/u Xq++ Ne collisions

B. Sulik, I. Kádár, S. Ricz, D. Varga, J. Végh, G. Hock, D. Berényi

Research output: Contribution to journalArticle

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Abstract

The simple geometrical model we developed recently for ionization probabilities on the basis of a geometrical BEA picture is generalized and extended to take into account magnetic substates and non-zero impact parameter ion-atom collisions. Ionization probabilities per electron for the L shell and separately for the 2s and 2p Subshells of neon in 5.1 MeV/u N+ and N7+ as well as 5.5 MeV/u H+ collisions were determined from 0.8-1 eV resolution K-Auger spectra. Anisotropy parameters of KL-LL23L23 satellite lines were determined in 5.5 MeV/u Ar6+, Ne10+ and 5.1 MeV/u N2+ collisions. The comparison of the extended model with the experimental data shows a good agreement. The model seems to be able to give account of the dependence of the ionization probability on quantum numbers l and m. Comparing the results with a wide range of experimental data no contradictions were found with the universal scaling features predicted by the model. By analyzing the impact parameter dependence of ionization probabilities the validity of the model was estimated to break down at ν1 ≈ ν2/3 towards lower impact velocities.

Original languageEnglish
Pages (from-to)509-518
Number of pages10
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume28
Issue number4
DOIs
Publication statusPublished - Nov 1 1987

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Ionization
ionization
collisions
Neon
impact velocity
neon
quantum numbers
low speed
Anisotropy
breakdown
Satellites
Ions
scaling
Atoms
anisotropy
Electrons
atoms
ions
electrons

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Instrumentation
  • Surfaces and Interfaces

Cite this

A simple theoretical approach to multiple ionization and its application for 5.1 and 5.5 MeV/u Xq++ Ne collisions. / Sulik, B.; Kádár, I.; Ricz, S.; Varga, D.; Végh, J.; Hock, G.; Berényi, D.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 28, No. 4, 01.11.1987, p. 509-518.

Research output: Contribution to journalArticle

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