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A: Fachverband Atomphysik

A 27: Posters: Electron scattering and recombination

A 27.1: Poster

Thursday, March 13, 2008, 16:30–18:30, Poster C3

Characteristic x–ray emission following the radiative capture and projectile excitation in relativistic ion–atom collisions — •Stephan Fritzsche^1,2, Andrey Surzhykov^1,3, and Thomas Stöhlker^2,4 — ¹Max–Planck–Institut für Kernphysik, Heidelberg — ²Gesellschaft für Schwerionenforschung (GSI), Darmstadt — ³École Normale Supérieure, Paris — ⁴Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg

During the last decade, the radiative electron capture of target electrons by high–Z ions and the projectile excitation have been studied in great detail at the GSI storage ring in Darmstadt. Typically, both of these processes lead to an alignment of the excited states of the ions with regard to the incident beam direction and, hence, to an anisotropic emission and polarization of the decay x–ray photons [1]. From the angular and polarization analysis of this emission, however, one can learn a lot about the structural properties as well as the dynamical behaviour of few–electron heavy ions in very strong electromagnetic fields.

In this contributions, we shall consider especially the Lyman–α₁ (2p_3/2 → 1s_1/2) and Kα₁ (1s 2p_3/2 → 1s_1/2²) radiative transitions in hydrogen– and helium–like uranium ions and compared the emitted characteristic radiation for an initial electron capture versus the Coulomb excitation of the projectiles [2].

[1] S. Fritzsche et al., J. Phys. B 38 (2005) S707.

[2] A. Surzhykov et al., Phys. Rev. A 74 (2006) 052710.