Dresden 2011 – scientific programme
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A: Fachverband Atomphysik
A 21: Atomic systems in external fields II
A 21.2: Talk
Thursday, March 17, 2011, 14:15–14:30, BAR 205
Long-lived resonance states in planar helium — Celsus Bouri1,2, Johannes Eiglsperger3, Javier Madronero3,4, Felix Joerder1, •Pierre Lugan1, Vera Neimanns1, Klaus Zimmermann1, and Andreas Buchleitner1 — 1Physics Department, University of Freiburg, Germany — 2CEPAMOQ, Universite de Douala, Cameroon — 3Physics Department, TU Munich, Germany — 4PAMO, Universite catholique de Louvain, Louvain la Neuve, Belgium
Doubly excited states of helium ionize because of the Coulomb interaction between the two electrons of the atom and the formation of resonance states. Long-lived resonance states have been identified in the form of so called frozen planet states [1], i.e. collinear configurations of the electrons and the nucleus, with zero angular momentum, which exhibit a remarkable stability. We report here on the identification of analogous long-lived resonance states for non-vanishing angular momentum, and on the characterization of electronic correlations in these states. The ionization of the latter is analyzed on the basis of partial decay rates extracted from complex dilation.
[1] K. Richter and D. Wintgen, J. Phys. B 23, L197 (1990).