Alignment of heavy few-electron ions following excitation by relativistic Coulomb collisions

Andrey Surzhykov, U. Jentschura, Thomas Stöhlker, Alexandre Gumberidze, Stephan Fritzsche

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The Coulomb excitation of highly charged few-electron ions in relativistic collisions with protons and low- Z atoms is studied within the framework of first-order perturbation theory and the multiconfiguration Dirac-Fock method. Apart from the computation of the total excitation cross sections, a detailed theoretical analysis has been performed for the magnetic sublevel population of the residual ions. To describe this population, general expressions are derived for the alignment parameters of the excited states of the ions, taking into account the relativistic and many-electron effects. Calculations are performed for the K→L and K→M excitation of helium- and lithiumlike uranium ions and for a wide range of projectile energies. It is shown that the alignment of heavy few-electron ions is sensitive to relativistic and magnetic-interaction effects and, hence, to the collision energies of the projectiles. The theoretical predictions are discussed in the context of recent measurements on the Coulomb excitation of heliumlike uranium U90+ ions which were recently performed at the GSI storage ring in Darmstadt.

Original languageEnglish
Article number042722
JournalPhysical Review A
Volume77
Issue number4
DOIs
Publication statusPublished - Apr 28 2008

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Coulomb collisions
alignment
excitation
ions
electrons
uranium
projectiles
many electron effects
collisions
perturbation theory
helium
protons
energy
cross sections
predictions
atoms

ASJC Scopus subject areas

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

Cite this

Alignment of heavy few-electron ions following excitation by relativistic Coulomb collisions. / Surzhykov, Andrey; Jentschura, U.; Stöhlker, Thomas; Gumberidze, Alexandre; Fritzsche, Stephan.

In: Physical Review A, Vol. 77, No. 4, 042722, 28.04.2008.

Research output: Contribution to journalArticle

Surzhykov, Andrey ; Jentschura, U. ; Stöhlker, Thomas ; Gumberidze, Alexandre ; Fritzsche, Stephan. / Alignment of heavy few-electron ions following excitation by relativistic Coulomb collisions. In: Physical Review A. 2008 ; Vol. 77, No. 4.
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