Theoretical Research On The Energy Structure And Oscillator Strength Of Excited States For Fe～(23+) Ion

The development directions and the present main research contents of atomic and molecular physics are commented firstly. After the summarization of the methods in the theory of atomic structure, the occasion that highly excited and highly charged ions have been the important research area is expounded. The property of the Lithium-like atoms, especially, the ions of three electrons with 1s2-core is important because of their particularity. In this paper, FCPC method is extended to calculated the energy structures of 1s2nl (l = s, p;n≤9) states for Fe23+ ion.Based on the energies of the excited states form the FCPC method, the quantum defects of 1s2nl (l = s, p;n≤9) tow Rydberg series for Fe23+ ion are determined by the single-channel quantum defect theory. The energies of any highly excited states with n≥10 also can be reliably predicted by using the quantum defects which are function of energy. The dipole oscillator strengths for the 1s2ns-1s2np (n≤9) transitions of Fe23+ ion are calculated with the energies and FCPC wave functions obtained above. Combining the quantum defect theory with the discrete oscillator strengths, the discrete oscillator strengths for the transitions from the given initial state to highly excited states (n≥10) and the oscillator strengths density corresponding to the bound-free transitions are obtained.