Düsseldorf 2007 – scientific programme
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A: Fachverband Atomphysik
A 19: Photoionization
A 19.5: Talk
Thursday, March 22, 2007, 12:45–13:00, 5M
Above threshold interchannel coupling effects in the Cs 3d spin orbit doublet — •Tobias Richter1, Elke Heinecke1, Peter Zimmermann1, Kai Godehusen2, Methap Yalçinkaya3, Denis Cubaynes4, and Michael Meyer4 — 1Technische Universität Berlin, Institut für Optik und Atomare Physik, Berlin, Germany — 2BESSY GmbH, Berlin, Germany — 3Istanbul University, Physics Department, Istanbul, Turkey — 4LIXAM, Orsay, France
The asymmetry parameter β and partial cross section σ of Cs 3d5/2 photo electrons were investigated near the threshold of the 3d3/2 channel at about 750 eV. The interchannel coupling has a dramatic influence on β5/2 in the energy region where the mixing with the 3d3/2 channel produces a pronounced minimum in the partial cross section σ5/2. Obviously the phase difference of the outgoing p and f waves dominates the behaviour of β5/2 there. This above threshold effect is activated by the spin orbit interaction.