Parts | Days | Selection | Search | Updates | Downloads | Help
A: Fachverband Atomphysik
A 30: Poster: Interaction with VUV and X-ray light
A 30.12: Poster
Wednesday, March 20, 2013, 16:00–18:30, Empore Lichthof
A high precision experimental benchmark of Fe M-shell unresolved-transition-array (UTA) inter-shell absorption lines — C. Beilmann1, M. Leutenegger2, R. Steinbrügge1, J. Rudolph1,3, S. Eberle1, M.C. Simon1, S.W. Epp1, A. Graf4, G.V. Brown4, P. Beiersdorfer4, T.M. Baumann1, F.R. Brunner1, S. Bernitt1, Z. Harman1,5, N.S. Oreshkina1, C.H. Keitel1, R. Follath6, G. Reichardt6, J. Ullrich1, and •J.R. Crespo López-Urrutia1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2NASA/GSFC, Greenbelt MD, USA — 3Universität Gießen, Germany — 4LLNL, Livermore CA, USA — 5EMMI, Darmnstadt, Germany — 6HZB/BESSY, Berlin, Germany
Measurements of inner-shell absorption lines in highly charged ions have been performed with the portable electron beam ion trap FLASH-EBIT. It was coupled to a high-resolution monochromator at the synchrotron X-ray source BESSY II [1] to measure the resonant excitation energies of states decaying by autoionization or photon emission, which are measured by counting photoions and fluorescence photons in dependence of the X-ray energy. We compared the results with those of our own state-of-the-art relativistic configuration-interaction and multiconfiguration Dirac-Fock calculations, as well as with other recent calculations. The experimentally determined resonance energies typically have absolute precisions of about 70 meV, stringently benchmarking theory.
[1] M.C. Simon et al., Phys. Rev. Lett. 105, 183001 (2010)