Hannover 2013 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 15: Precision spectroscopy of atoms and ions III (with Q)
A 15.5: Vortrag
Dienstag, 19. März 2013, 12:15–12:30, B 305
Electron correlation effects in resonant photorecombination and excitation processes with highly charged ions — •Zoltán Harman1,2 and Christoph H. Keitel1 — 1Max Planck Institute for Nuclear Physics, Heidelberg — 2ExtreMe Matter Institute EMMI, Darmstadt
Relativistic electron correlation effects greatly determine the recombination and excitation dynamics of highly charged ions, and thus the time evolution of astrophysical and magnetically confined plasmas. In case of resonant recombination, we have found that three-body correlation effects may give rise to significant additional reaction channels beyond what is known from the usual two-body theory describing dielectronic recombination [1]. Bound-electron correlation effects also determine the intensity of x-ray emission of highly charged ions excited by photons or electron collisions in stellar plasmas. These intensities play an important role in astrophysical modeling and in the analysis of spectra recorded by space observatories. We compare our theoretical results to experimental measurements with electron beam ion traps [1,2]. – [1] C. Beilmann et al., Phys. Rev. Lett. 107, 143201 (2011). [2] S. Bernitt et al., Nature, 492, 225 (2012).