K α1 radiation from heavy, heliumlike ions produced in relativistic collisions

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

Research output: Article

9 Citations (Scopus)

Abstract

Bound-state transitions in few-electron, heavy ions following radiative electron capture are studied within the framework of the density matrix theory and the multiconfiguration Dirac-Fock approach. Special attention is paid to the K α1 (1 s1/2 2 p3/2 P J=1,2 1,3 →1 s 1/2 2 S J=0 1) radiative decay of heliumlike uranium U90+ projectiles. This decay has recently been observed at the GSI facility in Darmstadt, giving rise to a surprisingly isotropic angular distribution, which is inconsistent with previous experiments and calculations based on a "one-particle" model. We show that the unexpected isotropy essentially results from the mutual cancellation of the angular distributions of the P11 → S01 electric dipole and P23 → S01 magnetic quadrupole transitions, both of which contribute to the K α1 radiation. Detailed computations on the anisotropy of the K α1 radiation have been carried out for a wide range of projectile energies and are compared to available experimental data.

Original languageEnglish
Article number052710
JournalPhysical Review A
Volume74
Issue number5
DOIs
Publication statusPublished - 2006

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projectiles
heavy ions
angular distribution
collisions
matrix theory
isotropy
decay
radiation
electron capture
cancellation
electric dipoles
uranium
quadrupoles
anisotropy
electrons
energy

ASJC Scopus subject areas

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

Cite this

K α1 radiation from heavy, heliumlike ions produced in relativistic collisions. / Surzhykov, Andrey; Jentschura, U.; Stöhlker, Thomas; Fritzsche, Stephan.

In: Physical Review A, Vol. 74, No. 5, 052710, 2006.

Research output: Article

Surzhykov, Andrey ; Jentschura, U. ; Stöhlker, Thomas ; Fritzsche, Stephan. / K α1 radiation from heavy, heliumlike ions produced in relativistic collisions. In: Physical Review A. 2006 ; Vol. 74, No. 5.
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