Hartree-Fock calculations for excited states of two-electron systems in strong magnetic fields

The Hartree-Fock method with single-particle wavefunctions adapted in symmetry to the respective regimes, i.e. spherical wavefunctions for dominating Coulomb forces ( beta _z=B/(Z²4.7010*10⁵ Tesla)<or approximately=1) and cylindrical wavefunctions for dominating Lorentz forces ( beta _z>or approximately=1), has been employed to determine wavefunctions, energies and oscillator strengths of helium-like atoms for magnetic field strengths in the range 4.7*10¹ to 4.7*10⁸ T. In addition, the problem of level correspondence between the low-field and high-field domains is solved.