DPG Phi
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DPG

Berlin 2001 – scientific programme

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A: Atomphysik

A 13: Photoionisation I (joint session A and MO)

A 13.9: Talk

Thursday, April 5, 2001, 17:45–18:00, H1012

l-dependent alignment transfer in the autoionization of doubly excited Ne 2p4 (3P) 3p 2P3/2,1/2 nl-states — •Bernd Zimmermann1, Sven Kammer1, Sascha Mickat1, Karl-Heinz Schartner1, Holger Liebel2, Arno Ehresmann2, Hans Schmoranzer2, and Viktor Sukhorukov31JLU Giessen, 1. Phys. Institut, Heinrich-Buff-Ring 16, 35392 Giessen — 2Uni Kaiserslautern, 67653 Kaiserslautern — 3Rostov State University of Transport and Communications, 344038 Rostov-on-Don, Russia

The photon induced Ne+ 2p4 (3P) 3p 4P3/2–satellite is populated only through autoionization, because it is forbidden in LS-coupling. These autoionization resonances are well known and can be assigned easiliy. Using linear polarized light from BESSY II, high resolution studies applying photon induced fluorescence spectroscopy (PIFS) resolve the finestructure splitting of the Ne 2p4 (3P) 3p 2P3/2,1/2 ns,nd Rydberg series, which decay into the Ne+ 2p4 (3P) 3p 4P3/2–satellite. Measuring the alignment parameter A20 of the Ne+ 2p4 (3P) 3p 4P3/2–state, the ns– and nd–series show different values. The experimental results allow to conclude that the autoionization of the ns–electron occurs predominantly through the emission of the s1/2–partial wave, while for nd–electrons the d5/2–partial wave dominates.

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