Energies and oscillator strengths of lithium in a strong magnetic field

Accurate energy levels, transition wavelengths, and dipole oscillator strengths involving the 1s(2)2s(0), 1s(2)2p(-1), and 1s(2)3d(-2), states of lithium in strong magnetic field up to 1.27 x 10(6) T are calculated using the modified full core plus correlation method. The contributions to the energy levels from electron correlation is found to be smaller than 0.06 a.u. in the present calculations. Taking evidence from a detailed convergence study into account, the results for the energy levels are expected to be accurate to within 10(-5) a.u. The wavelength for the 1s(2)2p(-1)-1s(2)3d(-2) transition shows a stationary line characteristic, useful for the understanding of observed spectra from white dwarf stars. The absorption oscillator strengths in the length and velocity gauges given in this work are, to the best of our knowledge, the first values for a three-electron atom in a strong magnetic field.