THE FINE STRUCTURES OF THE ENERGY LEVELS FOR THE LOW-LYING EXCITED STATES OF LITHIUM-LIKE ATOM

The energy levels for the first excited State of lithium-like atom are calculated by variational method. The fine structures of the first excited state for lithum-like atom are calcualted by the wave functions of the first excited states obtained from variational method, in which LS coupling is considered. The theoretical result is compared with the experimental data and theoretical error is a tittle.