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A: Fachverband Atomphysik
A 32: Collisions, scattering and correlation phenomena
A 32.4: Vortrag
Donnerstag, 14. März 2019, 15:00–15:15, S HS 3 Physik
Resonance strengths for dielectronic recombination of highly charged ions and improved empirical Z-scaling law — •Zoltán Harman1, Chintan Shah1, Antonio J. González Martínez1,2, Ulrich D. Jentschura1,3, Hiro Tawara1, Christoph H. Keitel1, Joachim Ullrich1,4, and José R. Crespo López-Urrutia1 — 1Max Planck Institute for Nuclear Physics, Heidelberg, Germany — 2Instituto de Instrumentación para Imagen Molecular, Universitat Politècnica de València, València, Spain — 3Department of Physics, Missouri University of Science and Technology, Rolla, USA — 4Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
Theoretical and experimental resonance strengths for KLL dielectronic recombination (DR) into He-, Li-, Be-, and B-like mercury ions are presented, based on state-resolved DR x-ray spectra recorded at the Heidelberg electron beam ion trap. The DR resonance strengths were experimentally extracted by normalizing them to simultaneously recorded radiative recombination signals. The results are compared to multiconfiguration Dirac-Fock and relativistic configuration interaction calculations that include electron correlation and mixing effects. Combining the present data with other existing ones, we derive an improved semi-empirical scaling law for DR resonance strength as a function of the atomic number Z, taking into account higher-order relativistic corrections, which are especially relevant for heavy highly charged ions. — Z. Harman et al., submitted (2018); arXiv:1807.03366