Düsseldorf 2007 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 11: Poster I - Collisions with electrons and ions
A 11.2: Poster
Dienstag, 20. März 2007, 16:30–18:30, Poster B
Investigating correlated few-electron dynamics and QED contributions by means of dielectronic recombination into highly-charged Fe, Kr, Xe, Ba, W, and Hg ions — •Z. Harman1, V. Mäckel1, A. J. González Martinez1, J. R. Crespo López-Urrutia1, A. N. Artemyev1,2, U. D. Jentschura1, C. H. Keitel1, O. Postavaru1, H. Tawara1, I. I. Tupitsyn1,2, and J. Ullrich1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg — 2St. Petersburg State University, Oulianovskaya 1, 198504 St. Petersburg, Russland
The photorecombination of highly charged He- to B-like ions has been explored in the atomic number range Z=26 to 80 with the Heidelberg electron beam ion trap [1,2]. The energies of state-selected dielectronic recombination (DR) resonances were determined over the KLL region. At the present level of experimental accuracy, it becomes possible to make a detailed comparison to various theoretical approaches and methods, all of which include relativistic and quantum electrodynamic (QED) effects. Theoretical resonance energies for KLL DR are calculated by various means [3]. The comparison of theoretical values with the experimental energies shows a good overall agreement. Few discrepancies are found in specific recombination resonances for initially Li- and Be-like heavy ions.
[1] A. J. González Martínez et al., Phys. Rev. A 73, 052710 (2006).
[2] V. Mäckel et al., to be published
[3] Z. Harman et al., Phys. Rev. A 73, 052711 (2006).