Bound-state Energies of Lithium in Magnetic Fields Using Hylleraas Basis Functions

The variational method in Hylleraas coordinates is applied to calculate the 1s(2)2s(0), 1s(2)2p(-1), and 1s(2)3d(-2) states of the lithium atom in magnetic fields with field strength up to 2 x 10(9) G. The computational method is based on multiple basis sets that are optimized for all nonlinear parameters for a given field strength. The oscillator strengths are also investigated for some transitions in magnetic fields.