A new method for measurement of post-collision interaction effects in ion—atom collisions

L. Sarkadi, T. Vajnai, J. Vegh, A. Kövér

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We present a new experimental method for determination of the postcollision interaction (PCI) distortions of the lineshape of Auger electrons excited in ion-atom collisions. The method is based on the assumption that the excitation ofAuger electrons from a target atom by electron capture on impact of singly chargedionB is not influenced by PCI in regard to the the absence of charged outgoing particles.Consequently, by detection of Auger electrons following capture a reference line canbe obtained which is free of PCI distortions. As a demonstration of the method wehave studied the shape of the L3-M2 2 3(1S0) Auger line of argon excited by 0.7 MeVprotons detecting the electrons in coincidence with the neutralized H° atoms andwithout it. Further non-ooincidence measurements determining the asymmetry ofthe L3-M2 2 3Auger lines as a function of the proton energy and observation angle have also been made. The results are in a qualitative agreement with the semiclassical theory of van der Straten and Morgenstem.

Original languageEnglish
Pages (from-to)1655-1668
Number of pages14
JournalJournal of Physics D: Applied Physics
Volume24
Issue number7
DOIs
Publication statusPublished - Apr 14 1991

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collisions
Electrons
electrons
Atoms
interactions
atoms
proton energy
electron capture
Argon
Charged particles
charged particles
argon
asymmetry
Protons
Demonstrations
Ions
excitation
ions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials

Cite this

A new method for measurement of post-collision interaction effects in ion—atom collisions. / Sarkadi, L.; Vajnai, T.; Vegh, J.; Kövér, A.

In: Journal of Physics D: Applied Physics, Vol. 24, No. 7, 14.04.1991, p. 1655-1668.

Research output: Contribution to journalArticle

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AB - We present a new experimental method for determination of the postcollision interaction (PCI) distortions of the lineshape of Auger electrons excited in ion-atom collisions. The method is based on the assumption that the excitation ofAuger electrons from a target atom by electron capture on impact of singly chargedionB is not influenced by PCI in regard to the the absence of charged outgoing particles.Consequently, by detection of Auger electrons following capture a reference line canbe obtained which is free of PCI distortions. As a demonstration of the method wehave studied the shape of the L3-M2 2 3(1S0) Auger line of argon excited by 0.7 MeVprotons detecting the electrons in coincidence with the neutralized H° atoms andwithout it. Further non-ooincidence measurements determining the asymmetry ofthe L3-M2 2 3Auger lines as a function of the proton energy and observation angle have also been made. The results are in a qualitative agreement with the semiclassical theory of van der Straten and Morgenstem.

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