Hamburg 2009 – scientific programme

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A: Fachverband Atomphysik

A 13: Atomic Systems in External Fields II

A 13.3: Talk

Tuesday, March 3, 2009, 17:30–17:45, VMP 6 HS-B

Hartree-Fock-Roothaan calculations of bound-bound transitions for medium-Z atoms in strong magnetic fields — •Akin Yildirim, Peter Diemand, and Günter Wunner — 1. Institut für theoretische Physik, Universität Stuttgart, 70550 Stuttgart

We present an enhanced algorithm to compute energy levels and oscillator strenghts of astrophysically relevant atoms and ions in the range Z=2,..,26 at neutron star magnetic field strenghts in different ionization stages. Single-particle orbitals are chosen as products of longitudinal wave functions with linear combinations of up to 8 landau levels, both of which are determined in a doubly self-consistent way solving the appropriate Hartree-Fock-Roothaan equations with the help of finite-element and B-spline techniques. In particular we discuss the problem of choosing “good” initial wave functions for excited orbitals.