Berlin 2001 – scientific programme

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A: Atomphysik

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

A 13.5: Talk

Thursday, April 5, 2001, 16:45–17:00, H1012

Single channel preference in the high–J rare–gas valence–satellite resonance enhancement — •Sven Kammer¹, Bernd Zimmermann¹, Sascha Mickat¹, Karl-Heinz Schartner¹, Holger Liebel², Arno Ehresmann², Hans Schmoranzer², and Viktor Sukhorukov³ — ¹JLU 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

Photon excited rare gas ions (satellites) are produced exclusively through electron correlations. In the near threshold range doubly excited states enhance the satellite production. In measurements at BESSY I and BESSY II we observe that the alignment parameter A₂₀ of satellite states with high J-values assume practically the same value for the same states of the np⁴ (n+1) p configuration for Ne, Ar and Kr. A₂₀ is nearly independent upon the photon energy inspite of the satellite production enhancement by different doubly excited states. The preferential contribution of d_5/2 electron partial wave, which follows from the measurement, is so far not understood.