Hamburg 2009 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
A: Fachverband Atomphysik
A 1: Plasma Interactions / Rydberg Atoms
A 1.5: Talk
Monday, March 2, 2009, 12:15–12:30, VMP 6 HS-B
Partial Auto-Ionization Rates of Doubly Excited States in Helium — •Maximilian Schmidt1, Celsus Bouri1, Javier Madronero2, and Andreas Buchleitner1 — 1Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg — 2Technische Universität München, James-Franck-Strasse, 85747 Garching
The spectrum of helium consists of a complex structure of stable, resonant and single continuum states. All doubly excited states are resonances and coupled to some single continuum channels, to which they decay due to electronic correlations. The Complex Rotation Method is a powerful technique to access resonant energies, widths and wave functions directly by diagonalizing the rotated two electron Hamiltonian in a L2 basis set. Nevertheless, this method does so far only provide the total auto-ionization rate. In this work, the partial auto-ionization rates for doubly excited states into different single continuum channels are calculated for the first time within the framework of the Complex Rotation Method. These calculations are obtained for 2D-helium, that mimics the realistic helium atom very well [1].
[1] J. Madroñero, P. Schlagheck, L. Hilico, B. Gremaud, D. Delande, and A. Buchleitner, Europhysics Letters 70, 183 (2005)