Hannover 2013 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 20: Poster: Precision spectroscopy of atoms and ions (with Q)
A 20.10: Poster
Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof
Lifetime and natural line width determination of Kα transitions in highly charged iron ions — •Jan K. Rudolph1,2, René Steinbrügge1, and José R. Crespo López-Urrutia1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2Institut für Atom- und Molekühlphysik, Gießen, Germany
Resonance spectroscopy measurements have been performed on photoexcited highly charged iron ions in the X-ray regime near 6.7 keV photon energy. The transportable Heidelberg electron beam ion trap FLASH-EBIT was used to produce and store Fe22+...24+ ions. The beamline P01 with its double-crystal monochromator at the PETRA III facility served as X-ray source. The energy resolution of the monochromator was 0.1 eV sufficient to determine natural line widths with good accuracy. While scanning the monochromator energy, ions were continuously extracted from the trap, separated by their charge-to-mass ratio and detected with a position sensitive detector. Thus, by simultaneously measuring the photoionization yield and the line width of all the signals, the Auger and radiative decay rates could be determined independently of geometric factors.