Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster III

A 26.16: Poster

Donnerstag, 17. März 2011, 16:00–18:30, P2

Photoionization and resonant photon scattering of highly charged iron ions — •C. Beilmann1, J.R. Crespo López-Urrutia1, M.C. Simon1, S.W. Epp1,2, R. Steinbrügge1, J. Rudolph1,3, S.N. Eberle1, M. Leutenegger4, A. Graf5, T.M. Baumann1, F.R. Brunner1, P. Beiersdorfer5, R. Follath6, G. Reichardt6, and J. Ullrich11Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2Max Planck Advanced Study Group at CFEL, Hamburg, Germany — 3Justus-Liebig-Universität Gießen, Germany — 4NASA Goddard Space Flight Center, Greenbelt MD, USA — 5Lawrence Livermore National Laboratory, Livermore CA, USA — 6Helmholtz-Zentrum Berlin - BESSY II, Berlin, Germany

Interactions of highly charged ions (HCI) and x-ray photons are important processes in astrophysical matter and for testing atomic structure theory. Resonant absorption of x-rays by HCI leads to excited states that can decay by autionization or radiative deexcitation. For the investigation of x-ray absorption, the trasportable electron beam ion trap FLASH-EBIT can be coupled to x-ray sources. Radiative deexcitation (RD) [1] as well as photoionization (PI) [2] were studied in separate experiments. We present results of an experiment at the synchrotron BESSY II, in which both decay channels could be detected simultaneously in the the astrophysically relevant ions Fe14+ and Fe15+. The simultaneous detection at 800 eV of both RD and PI allows for the first time a detailed view of all branches of this process in HCI.

[1] S.W. Epp et al., Phys. Rev. Lett. 98, 183001 (2007)

[2] M.C. Simon et al., Phys. Rev. Lett. 105, 183001 (2010)

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