Berlin 2005 – wissenschaftliches Programm
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A: Atomphysik
A 13: Poster HU 2
A 13.11: Poster
Dienstag, 8. März 2005, 08:30–18:30, Poster HU
Branching Ratios of the Radiative Decay of Doubly Excited He — •Karl-Heinz Schartner1, Sascha Mickat1, Rüdiger Schill1, Sven Kammer1, Lutz Werner2, Stephan Klumpp2, Arno Ehresmann2, and Hans Schmoranzer2 — 1I.Physikalisches Institut Universität Giessen, D-35392 Giessen — 2Fachbereich Physik, Technische Universität Kaiserslautern, D-67653 Kaiserslautern
In the radiative decay of (n,0)1P, (n,−1)1P and (n,+1)1P with N=2 doubly excited He states, three photons are consecutively emitted. Spectra for the corresponding cascades are registered using photon induced fluorescence spectroscopy (PIFS) in the spectral range of the VUV and the visible. Cross sections for the photon emission were measured and are compared with calculations. Good agreement is observed. Especially, for the (n,−1) - states a broad decay pattern is predicted with the (n−1)d → 2p transition having the largest relative probability. The experimental results confirm this prediction. Finally, the alignment of the 1s4d1D state is measured.