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A: Fachverband Atomphysik

A 21: Atomic systems in external fields II

A 21.2: Vortrag

Donnerstag, 17. März 2011, 14:15–14:30, BAR 205

Long-lived resonance states in planar helium — Celsus Bouri^1,2, Johannes Eiglsperger³, Javier Madronero^3,4, 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).